Dating my elgin wristwatch Real and pure cam to cam chat no registration
Obviously, these later cases can't be related to the movement serial number.Even after the 1920's, when watch companies started selling cased watches, the watch companies still bought the watch cases from outside sources and the serial numbers were still unrelated.In addition, watch cases tended to wear out much quicker than the watch movements.
The larger the number, the larger the diameter of the movement.
While it is open, make sure you record everything written on the movement of the watch and the watch case. A good description of how to open a pocket watch case and background information can be found here, thanks to the work of Kent Singer.
Opening wrist watch cases, especially ones made after around 1950, some times requires special tools.
Finally, I can find no definitive source of official dates, and there seems to be some disagreement between the various sources that I've found. The raw sources that I created this list from can be found here.
(Actually, it looks like I mostly used the first list...) I recommend you use the Elgin Online Database to learn approximately what year your watch was made. This page is really only useful as background information on how the Online Database determines the dates.