The Brock is also one of the few models that Hamilton did a coral gold version of in 1940. It's known as the Coral Brock and I did a post on that last February.
The Brock comes in a 14K solid gold case and you'll find it with either an AGN dial or, less frequently, with a two-tone black and gilt dial.
From a movement standpoint you will find a 19 jewel 982 movement in the 1939 version and after that you will find a 19 jewel 982M. The 982M Medallion movement was introduced in 1940 for all the solid gold watches that used a 14/0 size movement.
I recently scored a Brock and, based on the serial number of the movement, it is a 1950 model. I was able to snag the watch for a very good price because the seller listed it as a ladies watch in need of a battery.
The Brock is quite small by today's standards and would make a very nice ladies watch today. The seller's photos even made it look like a ladies watch - and even though I wasn't entirely positive, I was pretty sure it wasn't a ladies watch because only the men's watches have sub-second hands.
As received it was very dirty but a few turns of the crown showed that a "fresh battery" was not going to be needed.
With the bezel removed you can see that the dial is in very nice shape. Think it is original? Nope - it's a very nice refinish. One of the obvious signs in the little notch in between the 3 and the crown - see it, right on the edge of the dial?
The 982M from this era is highly damascened with a gold, almost orange, enamel in the engravings. Personally, I like the older 982M's with the actual medallion instead of the "circled M" on the later models.
Well, a thorough cleaning and fresh mainspring bring the watch back to vigorous life as you can see below on my timer. A little tweaking to the regulator will slow it down a smidge.
And here's the finished product, all polished up with a new genuine lizard strap. The acrylic crystal has a couple of cracks in the corners so I'll replace it.
My better half didn't get anything sparkly for Christmas this year so this might be a perfect "get out of the dog house free" card. I think I'll look for a nice 16mm short strap in addition to a new crystal.