Alex
Posted November 13, 2023 - 7:19pm
The movement date code was introduced only in 1924. Before that it is a best guess based on the case signature and case serial number. The serial numbers of the globe signature ran from 100….. to 109….. I believe this signature ran from 1920-1922 (but no hard evidence here!). So, the 105….. case serial number of the subject watch would place it around 1921.