I believe this to be an A11, the case looks like it could have survived a war. I am not accurate on the model or any other info. The crystal, back and strap are in great shape which leads me to believe they have all been replaced. Also it is not stamped like many others I have seen. Needs to be serviced because it is off by about 3 minutes per day but works.
Any corrected or additional info would greatly be appreciated. Thanks.
Hello Yahnoe, welcome to myBulova. I don't think this is a Military Issue watch ( or A-11). To answer your question, the lack of "Military" notation on the back means that is was not produced for the American Armed Services. The US Government produced specification for watches that several companies picked up and produced, Bulova among them. All of the watches manufactured for the military are noted with the spec on the back. As your watch doesn't have the markings I suggest it was produced for the open market. I would like to do a bit more research on an ID for your watch, thanks for sharing it.
Are there any other markings on the back case other than the serial number, which itself doesn't seem to be a standard Bulova number...too short and doesn't correspond with 1943.
It might very well have had the back case replaced, or the entire case is non-Bulova but a generic military type screw back.
Military style watches of this type without a military issue back case are normally ID'd as Military Non-Issue.