Thanks for visiting my vintage Hamilton watch blog. I like to restore US-made Hamilton wrist watches back to their original glory and share my experiences with other enthusiasts. Use the "Search" space below if you know what model you're looking for. Feel free to leave polite comments or questions in the spaces provided. Also check out my "watches for sale" on my Etsy site - the link is on the right, just below.

Sunday, August 13, 2017

Mystery 1969 Dateline S-6-something

The last catalog for the 1960's that I'm aware of is for 1968 and 1969.  For any model that was introduced in 1969 but not continued into the 1970's, there is no catalog depiction.  There are some well known US-made uncatalogued models from this year - like the Hamilton Liberty Coin.  But how would you know it's a 1969 model if it's not in a catalog?

Some non-cataloged models showed up in Hamilton advertisements.  The Hamilton Oval comes to mind - it wasn't shown in the 1928 catalog but it was advertised.  Of course the serial number of the movement helps to date watches from that era.

In the mid 1950's Hamilton stopped putting serial numbers on movements but in the 1960s they started adding model numbers to cases.  When applicable, the last two digits of the model number represents the first year of production.  So a model with a number that ends with 69 would be a 1969 model.

Mystery solved - sort of.  The model number doesn't tell you the model name, if it had one.

I recently had someone contact me about a watch that they were given by their grandfather and they wanted to know more about.  As you can see in the photo, it was in need of some help since the date complication wouldn't work.

I pulled the crown on the project watch out in order to pull the movement out the front.  In this shot of the case back you can see the model number is 920669, making this a 1969 model.

The movement inside the watch is a Hamilton 674.  This movement is based on an ETA 2408 and was used in the 1960s.  In the 1970s it was changed to a Hamilton 62 and it basically the same.

As you can see on the inside of the case, there is a serial number that is unique to this watch.  This numbers doesn't signify anything.  Presumably another watch was 040 and another was 042.  Based on the 10K RGP bezel and stainless steel back, I would presume this is a Dateline S-67-something... maybe a 677 since there was a S-676 in 1966.

The owner of this watch said his grandfather had a friend who worked on watches and he lost a part that made the date function work.  With the dial removed, I'd say he lost at least three parts.  First the driving gear for the date drive wheel is missing.  So there's nothing connecting the hour wheel in the center to the large golden wheel in the upper left.  There's also a screw missing for the set bridge.  Finally, based on the date being stuck between 30 and 31, I suspect the date jumper spring is also missing.

Yup - there's no U-shaped spring pushing the date jumper against the date wheel.  The date jumper centers the date wheel in between teeth when the drive wheel rotates the wheel clockwise.  I should be able to scavenge all of the missing parts from a donor movement.

I don't really like to work on watches that someone else has already buggered up.  I know I'm not alone in that preference - most professional watchmakers feel the same way.  It can take a lot of time to find and fix things that aren't right.  However, it's not usual to lose a part - tweezers can send a tiny part screw off into the stratosphere, never to be seen again.  What is unusual is to not replace it when you can't find it.  So I suspect the last guy to work on this watch wasn't a professional and that means this watch could have some other serious issues.

Everything gets taken apart, inspected and thoroughly cleaned.

The hands were missing most of their luminous paint.  So I will reapply a fresh coat.

The reassembled movement is now ticking away but the motion doesn't look quite right to my eye.  I'll let the timer tell me what's going on inside.

The beat error is a bit high - another clue that the last guy who opened this watch wasn't a pro.  The amplitude of 133 is way too low.  That tells me either the mainspring isn't the correct one for this watch or there's a problem with the barrel.

First I'll tweak the hairspring stud index and reduce the beat error.  Anything less than 1.0ms is good in my book but the closer to zero the better.

Sure enough, when I reinstalled the mainspring the lid on the barrel didn't fully close, or it popped back up.  That's enough that a tiny amount of drag was introduced, robbing the watch of power and resulting in low amplitude.

Okay - now I'm up to over 200 degrees.  That's not too bad since I haven't fully wound the watch.  There's no crown on the stem so it's a little hard to wind.

All of the parts for the date complication are present and accounted for.  Now the date function should work.

With the movement reinstalled in the case, I can fully wind the watch.  Notice the amplitude has increased.  I'm happy with an amplitude over 250 degrees.

I reinstalled the hands at 12:00 midnight so the time will match when the date changes.  Notice how the date is now centered in the window - that's thanks to the date jumper spring that I installed.  The new luminous paint on the hands really stands out nicely.   This watch is ready for wrist time and will be a great memento of the owner's grandfather.

Saturday, August 12, 2017

1957 Lincrest

There's an interesting bit of Hamilton trivia involving a few different models from the 1950's that shared the same cases.  One example is the Transcontinental A and the Automatic K-455.  Another is the Cross Country II and the 1957 Lincrest.

The 1957 Lincrest was produced for two years.

The Lincrest is a very unique-looking watch and has a complicated dial with radiating lines that look like a star-burst.  Two dial options were available, black or white.  Personally I think the dial makes reading the time a little difficult but it's still a very sharp looking model.  If it looks a little familiar, it might be because it looks a lot like a 1958 Automatic K-409.

Tucked inside the case is an 18 jewel Lancaster-made 735 movement.

I recently received a Lincrest from a friend and it was in need of a little TLC.  It would run and stop.  Black dialed watches are very popular.  One of the challenges of a black dialed watch is they show every little spec of dust and lint that falls on, or within, the crystal.

I like the red-tipped second hand, without that the second hand would get lost in all of the golden radiating lines.

The stainless steel back looks almost as if this was a one-piece case, but it's not.

If you look very closely at the rear cover you can see there's a slight lip between the lugs.  I can slip my case knife in there and pop back cover off.

Here's something you don't see every day - a Hamilton strap.  Is it original to the watch?  Possibly.

Here's one potential reason for the intermittent running.  Notice the second hand is flared upward.  It might be rubbing the inside of the crystal and stopping the watch.

The 735 is a shock jeweled version of the older 748 movement.  This one is in good shape but could stand to be cleaned.

Notice the inside of the case back is stamped "Cross Country II" and misguidedly makes identifying this model problematic.  Although the only difference between the Cross Country II and the Lincrest is the dial.

Speaking of the dial, this one has all the indications of being original.  There are no markings on the case back whatsoever.

The crystal that came on the watch is a bit beat up so I will replace it.  Looks like a 28.7mm diameter crystal will be required.

A GS PHD high dome crystal should do nicely.

Everything is cleaned and readied for reassembly.

The 735 and 748 can be challenging movements to reassemble but this one came together pretty easily and it's back to running smoothly.

Oops... I spoke too soon.  Something inside is making a lot of noise, relatively speaking.  I'll reclean the hairspring and try again.

There... that's much better.  I'll leave it running a smidgen fast for now.

This watch really came together nicely.  I was able to clean the dial, polish the case and with a new crystal this watch is ready for wrist time.

Sunday, August 6, 2017

1910 No. 900 Pocket Watch - Every One a Masterpiece

I know some collectors who focus purely on pocket watches.  In fact, for the first 25 years or so of Hamilton's existence pocket watches were pretty much all they made.  Wrist watches for men didn't come into fashion until WWI.

Personally I find pocket watches to be little on the boring side.  However, there are some very unique and scarce Hamilton pocket watch movements that make finding them a fun and interesting challenge.  In addition, there is something uniquely appealing about 100+ year old time pieces that still perform as well as they did when they were new.

Hamilton truly made excellent pocket watches.

Unlike other well known American brands like Elgin or Waltham, Hamilton did not make entry-level watches.  It takes 15 jewels to "fully jewel" a watch movement.  Many brands started their line up with 7 jewel grades.  Every Hamilton model made after 1900 had a minimum of 17 jewels.  The pre-1900 models with fewer than 17 jewels are extremely scarce and highly collectible.

When you look closely at the design details and accouterments of Hamilton's higher end watches you can understand why Hamilton marketed their brand with the tagline "Every One a Masterpiece".

In 1910 Hamilton introduced a dress pocket watch with 19 jewels... the model No 900.  It was their first 12 size model, although it was followed quickly by the No 920, 914 and 910.  Over the next several decades a variety of 12 size dress pocket watch movements would be produced but the 900 started them all.

Back in the day you typically went to a jeweler to pick out a pocket watch movement and then selected a case for the jeweler to install it in.   You could get a lower-end 17 jewel movement and install it in a solid 18K gold case or you could get a high-end 23 jewel movement installed in a base-metal / nickel-silver case (not that you would, if you could afford a 23 jewel grade you could probably afford a solid gold case too).

Eventually Hamilton evolved to selling pre-cased movements and the No. 900 was one of the early pre-cased models.  The No. 900 was marketed as the thinnest watch made in America at that time.  It's not a railroad watch or a "working man's watch".  It was the sort of a watch a man of distinction would wear in the vest pocket of his three-piece suit.  The grade 900 was produced into the early 1920's, ending with about 1923.

When you look closely at the catalog depiction a lot of very intriguing details are defined.  First, the movement has 19 jewels... 17 jewels are rubies set in solid gold chatons (settings) and the remaining two are sapphires used for the pallet fork.  The train wheels are solid gold, except for the steel escape wheel.  The escape wheel takes the beating from the pallet fork.  In fact, it's the collision between the pallet fork and the escape wheel you hear when you hear the watch ticking.  Using steel was a superior choice for this high-wear application.

The balance was adjusted to five positions, reflecting all of the positions the watch might find itself in while in your vest pocket or on a table.  The compensation balance allowed the watch to be accurate throughout a range of temperatures and the term "isochronism" meant that the balance would keep a consistent beat rate regardless of the force applied by the mainspring.  The double roller escapement provided extra protection from the watch over-banking due to an accidental bump.  Lastly, every No. 900 was pre-cased in either a solid 14K gold case or a gold filled case that were guaranteed forever.

I recently landed a grade 900 pocket watch, mainly because I didn't already have one on the blog.  However, I also got it because I am a sucker for the aesthetic design of these early movements.  To me, every one of these watches deserve a clear display back... they are just marvels to look at and appreciate.  

My project watch arrived in decent shape and my main concern was whether or not the stem sleeve inside the pendant would still be in good condition.  Most pendant-set pocket watches from this era are negative set, meaning the springs inside the movement constantly want to push the stem and crown out to the time-setting position.  The stem sleeve works in conjunction with the stem to keep the stem in the winding position until you overcome it by pulling the crown out to set the time.  If the sleeve is worn, the crown will pop out on it's own, thanks to the force of the springs inside the movement.  Stem sleeves are unique to the case design and replacing them can be a challenge.  Thankfully, this watch case is in excellent shape.

There are three hairline cracks in the porcelain dial.  It turns out they align with the dial foot screws and I suspect that the dial was damaged years ago by someone trying to remove the dial without loosening the dial foot screws.  Oh well, it happens.  I doubt I'll look this good when I'm 107 years old.

The case back is nicely engraved with three initials. The first letter is a W but I don't know what the other two are... maybe and L and an S?

The dust cover inside the case back is missing the Hamilton crest engraving.  That was an option at the time, as you can see in the catalog, and it left this area available for personalization or an engraved dedication.

This case does not say solid 14K gold and it doesn't say gold filled either.  Back in 1910 jewelry standards for gold filled didn't exist yet.  Cases often just had a warranty period and the longer the period the thicker the gold on a filled case.   So a 10 year case had less gold than a 15 year case, and a 20 year case had less than a 25 year case, etc.  This case was warranted to wear "permanently" so if its not solid gold it's pretty darn close to it.

Here's the money shot for the grade 900 and why I'd love to flip the movement around and display it through the crystal.  This is just a beautifully elegant design in my opinion and one reason why this movement, and those like it, always sell for good money.

Two case screws hold the movement to the inside of the case.  Once they are removed I can pull the crown out to the setting position and swing the movement out through the front of the case.

There are three dial foot screws on the side of the movement.  When they are loosened the dial can be lifted off.

In this shot of the main plate you can see the fairly simple design of the keyless works and the spring levers that make this a negative set movement.  Without the stem pushed in, the natural state of the movement is to be in the setting position.  When you push the stem in (and hold it in place with the stem sleeve), the spring levers are overcome and move the clutch wheel against the winding pinion and put the watch in the winding position.

You have to be very careful when the dial isn't installed.  The second hand bit extends out of the main plate and is easily snagged and bent if you're not careful.

The 900 is basically a 17 jewel movement with two extra jewels to support the motor barrel.  A motor barrel is an interesting design, as you'll see further in this disassembly.  The barrel has a fixed arbor that acts like an axle that rotates within jeweled settings on each end.

I'll remove the crown wheel first.  It has it's own bridge that is held in place with two screws.

I decided to flip the movement around and remove the balance, just to prevent it from damage in the event of a mishap.

With the balance (and pallet fork) removed, I can take off the crown wheel's bridge and reveal access to the parts below it.

Two screws hold the barrel bridge in place and the entire assembly can be slid out once the screws are removed.  Now you can see that the ratchet wheel (aka winding wheel) is actually held onto the barrel.  In watches without a motor barrel the ratchet wheel just comes lifts right off.  However, that's not the case in this watch.

First I can separate the outer part of the two-piece arbor from the mainspring and now you can see the axle that goes through the barrel bridge and is supported by the jewel in the center of the ratchet wheel.  The outer part of the arbor is threaded into the ratchet wheel and you need to unscrew it in order to remove the ratchet wheel from the barrel bridge.

In this shot you can see the ratchet wheel and arbor are unscrewed and separated.  The outer part of the arbor engages the innermost coil of the mainspring.  The outermost coil of the mainspring is attach to the barrel.  So when the ratchet wheel is turned, the arbor turns, and that mainspring is wound.  As the watch runs, the barrel turns and the mainspring unwinds.  That's basically how all mainsprings work but the two-piece design of the motor barrel enables much less friction.

With the cover off the barrel you can see the mainspring inside.  Notice the direction of the coils... I'll need to remember that when I put a fresh mainspring in.

Sure enough, the mainspring is a bit set, although it's not as bad as it could be.  I'll replace it anyway.

The center wheel and third wheel are supported by their own bridge, held on by two screws.

The fourth wheel has it's own bridge.

Lastly, the escape wheel also has it's own bridge.  You are starting to see why this watch is a masterpiece.  Every one of these parts is specifically made for this movement and each bridge is stamped with the serial number of the main plate.

Phew!  Everything is cleaned and ready for reassembly.  There are a lot of parts to this watch.

A fresh white alloy mainspring will give this watch 40+ hours of run time.

You get one chance to install the spring without having to wind it manually.  So I need to make sure I align the direction of the spring correctly before I push it out of it's retaining ring.  I don't want to have to remove it and re-wind it.  Pocket watch mainsprings can really pack a wallop.

If you're lucky (or good) you can get the tab of the spring to align with the slot in barrel without too much difficulty.

Now I can add some grease to the mainspring and close the barrel by reinstalling the cover.

I need to put the four train wheels in place before adding their bridges, as the fourth wheel bridge blocks access to the third wheel.

The train wheels are back in place.

There's a long strip of spring steel on the side of the barrel bridge that serves as the click and keeps the ratchet wheel from unwinding when you wind the watch.  In the shot below I am installing the screw that secures the spring in place.  The business end of the click is actually on the right side of the ratchet wheel as the spring extends under the wheel from left to right.

I wound the watch up a little bit and installed the balance.  The movement is brought back to life and is ticking away with good motion.

I have no complaints with this performance... pretty much right on the money.

Now to reinstall all of the parts on the dial-side of the main plate.

Voila!  This No. 900 looks and runs fantastic, almost as good as it did in 1910 when it was originally sold.  I know it's a 1910 model based on the serial number of the movement.  Too bad about the hairline cracks in the dial but thems is the breaks.

Here's a shot of the case back now that's it's been polished.  I still can't tell what the letters are though.  Any guesses?

The dust cover is almost as pretty as the rest of the watch.  Did I mention every one is a masterpiece?

Finally, here's the movement, sparkling away in all of it's brilliance.  Sure is a pretty watch, don't you think?