Reverend Rob
Posted May 29, 2018 - 11:46am
These are getting rare.
Produced mainly during the war years, possibly for a bid on a Military contract that fell through, the 10BK is based on the Bulova 10AK. The 10AK dates back to as early as 1936.
Both are entirely in house, albeit based loosely on the ETA 735. Since the 735 bears almost no similarities to the Bulova movts, I suspect only the wheels may be interchangeable, but this is speculation.