mybulova_admin
Posted December 11, 2014 - 4:16am
When did we established that the 'Shield' was first used in 1922?
We have come to the conclusion that case serial numbers starting with '11' date to 1921.
we have records showing that 'American Standard' was first used 1 August 1918 and that the American Standard Watch Case Company was founded 1920.
What I'm seeing so far with the records I've compiled is that:
1920-21
Globe with case serial number starting with '10' or '11'
1921-23
Shield with case serial number starting with '10', '11', '12' or '13'