Interstingly I couldn't find any date code on this movement so I am basing the year on the first digit of the case serial number.
Hinged case is 14K White Gold Filled
This is our only 15 J 10AP in the database. Did 10AP occur as late as 1929?
We have two 17J 10AP in 1926 Conquerors. One of these 10AP's has a date symbol triangle to 1926. One doesn't.
Will, I have the same watch with the 15 jewel 10AP movement and it looks like a square symbol on the barrel bridge. Movement serial number is 1.050.194. Inside case back is Bulova 14K Gold Filled American Standard Pat June 19, 1924 and serial number is 9623081. Case is white gold. My other one is yellow gold and has the 10A in it.
JP Cool you have white and yellow gold. I see an 1926 ad snippet provided by Jim Robson?
and 1927 ad snippet:
I noticed the corners where the horizontal/vertical bezel meet. In the ads above, it's kinda angled. Subject watch has that vertical "bar" that runs the full length of case, through where these angles appear in the two ads above.
Ambassador....or unknown?
I'm thinking unknown
It looks like the same case as in this 1929 ad, but minus the engraving. Still "Unknown" to me.
....OR, is it this one, looks like it says "BANKER" but can't be sure, and it looks unengraved compared to the other models in this 1930 ad. Anyone know for sure?
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T.A.T. Maddux ad above is showing the 'ENVOY' http://www.mybulova.com/sites/default/files/vintage_ads/bulova-ad-13-De…
subject watch Unknown IMO
Still wondering about the date of production for this 10AP movement......
I have just obtained a similar one the raised edges are in yellow gold and the rest of the case is white gold, I will post pics, movement has shield date code and serial number is 615363, 10AN 15J case number 9356179