By the late 1930's mens watches were more masculine. This was made possible by the advent of square movements.Until then all movements were round, limiting the designs.The Elgin and Hamilton were dated by serial number, while the Gruen was dated by an inscription on the back. In the 1930's there was a style change from highly engraved cases to smoother cleaner lines.The "New Haven" was dated by looking at the style of the watch. Notice that the watches from the early 1930's still have engraved cases.Should you require a more conclusive valuation of your time piece then please do not hesitate to To determine the approximate age of your watch, open the case and find the serial number, usually found engraved on the movement or the case back itself, then match it up with the list on this page.Cross reference the Movement number with the case number to find the time scale of when your watch was produced.The date of market introduction may vary however, so expect to add 6 to 18 months. An Omega watch serial number can be found engraved on the inside of the watch back or on the exterior of the watch depending on when the watch was manufactured.
Sometimes it is easy to answer, and sometimes it is impossible.Some companies (as with the Gruen Watch Company), even lost rocords to fire or other natural disaster. I am sure they had no idea that their timepieces would someday be collected.There are several ways to get an idea of when your watch was made.These numbers are stamped on the back (outside) of the case. The code was usually stamped on the back of the watch case.If there is no two symbols, it could be that your watch was made before 1948. For exabple, If you have a Bulova watch with the stamp M3 then it was made in 1963.The 1940's watch styles were very similar to the styles of the 30's. A few years following the end of WWII america entered a period of prosperity, economic growth, and technical advancements in electronics and science. Many (but not all) watches were affected by the vision of the future. 1960's watches were a little bigger than they had been before.