Info on Hamilton wrist watch

Peter Canna

NAWCC Member
Jun 12, 2019
25
4
3
Hi this is my first post so please excuse any missteps.

I am trying to get some info on a Hamilton wrist watch with a 10k gold case 27mm x 30mm and the following movement. I'll try to attach pictures.

I believe the movement model number is 987A and the serial number is 0160139. I acquired it as part of a group from another "collector". Although it's running great and appears in great shape, I doubt it's been serviced for decades. Based on the style, I'm guessing it's from the 40's?

The case number is 1253066. It also has what I assume are watchmaker marks etched in the back. One states GL, A4148. The other states 8M61CM. The 6 could be a 4.

How can I determine the age of the watch? And any other information you can provide would be appreciated.

What do the marks mean? I'm relatively new to collecting (not in age but in the hobby). I've done a few searches but haven't found a lot on Hamiltons. I have a number of early watches so even If you can direct me to another resource it would be helpful.

Thank you!

IMG_8290.jpg IMG_8288.jpg IMG_8292.jpg
 
  • Like
Reactions: viclip

Chris Radek

NAWCC Member
Apr 13, 2014
813
325
63
Lincoln, NE, USA
timeguy.com
Country
The 987A caliber was made from 1937-1948 so your intuition for dating based on style is good.

Hamilton Pocket Watch Information: Serial Number O160139 (Grade 987A) says this serial number is from about 1940.

The scratch marks are indeed made by watchmakers along the way. Mostly you can't expect to make any sense of them, unless they are obviously a date, since everyone used their own codes. Sometimes you'll see a dozen codes that are obviously dates marked by the same watchmaker over the years of his career - those are a delight to come across I think.

In modern days, some of us use a standard code (AWCI assigns their members standard case marks upon request), there may also be other standards I don't know about.
 
  • Like
Reactions: Peter Canna

Peter Canna

NAWCC Member
Jun 12, 2019
25
4
3
Thanks Chris, I appreciate all the information.

It helps a lot. I've only been collecting for a year or so but I find myself focusing on early American brands. This is perfect and will likely be a keeper.

Thanks again!
 

Similar threads

N
Replies
0
Views
1K
Nookster57
N
N
Replies
0
Views
842
Nookster57
N

Forum statistics

Threads
164,702
Messages
1,432,880
Members
85,748
Latest member
Avvador
Encyclopedia Pages
1,101
Total wiki contributions
2,863
Last edit
Rockford's early high grade movements by Greg Frauenhoff