Pocket Watch Database
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.
From the American Horology Archive:
E. Howard Watch Co. (Keystone)
Grade: Series 15
|Manufacturer:||E. Howard Watch Co. (Keystone)|
|Manufacturer Location:||Waltham, Massachusetts|
|Movement Serial Number:||11607|
|Estimated Production Year:||1921|
|Adjusted to Position:||Yes|
|Adjusted # of Positions:||5|
|Adjusted to Temperature:||Yes|
|Adjusted to Isochronism:||Yes|
Help Us Help Others By Improving the Database:
Does this information describe your movement accurately?
Data Verification Reports
Anonymous · August 13, 2020
Serial Number 10346 was reported as inaccurate.
ralph1 43 · July 15, 2020
Serial Number 9220 was reported as inaccurate.
black triangle with a circle around it and an
arrow through circle
I will upload picture, hope this helps
Anonymous · April 30, 2020
Serial Number 10420 was reported as inaccurate.
Anonymous · January 22, 2020
Serial Number 10253 was reported as inaccurate.