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, June 23, 2013

1965 Sea Mate II

Hamilton must have about 30 or more models named Sea-something.  So many, in fact, that they took to adding roman numerals to mark new models.  A good example is the 1965 Sea Mate II.  It's a completely different model than the 1959 Sea-Mate issued a few years earlier.

The Sea Mate II was one of a few watches that continued to be produced after 1969 - the year Hamilton was sold to what is now the Swatch Group.  It was produced until 1971.  Three dials where available... a white butler finished dial, a black dial and also a masonic dial.

The case is 10k rolled gold plate, RGP, with a stainless steel back.  It opens through the crystal so it has a two-piece stem.  I have found that these one-piece cases with a gold bezel and stainless back must be confusing to a lot of people - as it's not unusual to see pry-marks on the back where someone has tried to separate the two sections.

Inside is a Swiss-made Hamilton 688 movement... the same as an ETA 2390 with 17 jewels.

I recently picked up a Sea Mate II project watch.  After an overhaul, dial cleaning, new crystal and a strap - I think it turned out fantastic.


  1. How much would you say this watch is worth?

  2. All fixed up and in serviced condition probably $200, in my opinion. A black dialed version, probably more.

  3. I was trying to identify an old watch that I have and Hamilton told me what it was and sent me to your site. Great information.

  4. Hi,

    Just got myself a decent example of this SeaMate II.

    Missing the male portion of the winding stem and crown. Do you have a source where I might be able to procure a stem and crown.

    There seem to be stems for the eta 2390 - but can’t find the split versions that Hamilton used on this model?

    Any help would be great.



    1. Hi Russ. The male portion is a tap 10 male hub. Any tap 10 hub should work fine, as long as it's trimmed to the correct length. If you look on ebay for a "tap 10 male stem" you'll see them

  5. That’s great information.

    Thank you SO much. 👍🏼

  6. So, all fixed up and running - got to say, I’m REALLY pleased with the results - just got to find myself a decent crown now!

    Thanks for your help and encouragement. Very much appreciated.