The Pocket Watch Database has compiled data covering the major American pocket watch manufacturers and created an easy way to find information using the serial number on the watch movement. Here are a few tips to find information about your pocket watch:
Due to the lack of existing factory records, our E. Howard Watch Co. (Keystone) database has been reconstructed using observations of known watches.
As a result, the information may contain inaccuracies. Please let us know if you have details that can improve the database.
|Manufacturer:||E. Howard Watch Co. (Keystone)|
|Manufacturer Location:||Waltham, Massachusetts|
|Movement Serial Number:||2522|
|Estimated Production Year:||1921|
|Adjusted to Position:||Yes|
|Adjusted # of Positions:||5|
|Adjusted to Temperature:||Yes|
|Adjusted to Isochronism:||Yes|