William Smith
Posted February 27, 2015 - 2:31pm
In reply to I think I'm correct in saying by 1955mercury
Early movements in general, yes they often had both. Not sure about most of the 10AA, but we see 10AA exaples with both. Also noting the movement signature "Bulova Watch Co." which indicates post April 1923 or there abouts.
EDIT: Maybe that shoud be post June 1923...
Subject watch enlarged below.
Here's another ad snippet from June 1923 showing 153/154. Click on graphic for full ad.
