Movement: Bulova Watch Co. 15 Jewels Adjusted 10AN (circle date symbol)1934 - Inside Case Back: BULOVA QUALITY 4026183 (lots of jewelers marks from service history) - Outside Case Back: 10K Gold Filled BULOVA (on upper edge of case back) 338154 - Dial: White dial w/ black printed outer minute and sub second track, raised gilt BULOVA and hash marks. Gilt Index hands. - Case measurements: 33mm lug tip to lug tip by 25mm at widest point of steps (not counting crown) - Crystal measurements: 23.5mm x 15.3mm rectangular, measured in watch at front where bezel meets raised part of crystal. - Lug gap: 12.2mm at lug holes. - 10K Gold Filled, with BULOVA on edge of case. Note no bell-shaped symbol.
I'm still curious on others thoughts about two case serial numbers. Since this watch also has case serial number on the outside back, are we going with the number on the inside case for dating? ....and a proposed "why". It's American Standard. If there are two case SN's on an American Standard from around this time period, which one do we use for dating? I had thought the inside case SN was placed by Am Std, and if Bulova later fit the movement post case production, they may put "their" SN on the outside. Is this a correct assumption- generally speaking, or do we "decide" on a case by case basis?
Just because Am Std used a case SN beginning w/ 4, if the inside case SN's are using Am Std protocol, it doesn't mean the SN on outside back has to begin w/ 4 or higher? Perhaps there is no or little correlation between the inside case SN and date for those w/ two case SN's? I just thinking AM Std made the case, numbered it somehow, then Bulova "took it from there". Bulova didn't "own" American Standard (yet) did they? Guess I gotta check related threads and posts.
Bob points out the number of digits on "most"? case SNs is the same as the inside case SN.