Strange jewel count, I think this might be a frankenbully I hope not.
In reply to I don't think it is a by JP
The Square Shield indicates a manufacture Date of 1931, for the Movement.
The first numeral of the Case seriel number (2) indicates a manufacture date of 1932.
* 1932 something as the Watch couldn't exist without the 1932 Case and the Movement was manufactured prior.
In observance in general there have been some odd things, not odd but non A-typical things that go on with Bulova Watches dated 1930 - '32.
The Great Depression or even the 'firing up' of the Bulova Observatory may have had some impact.
The 15 Jewel 'CONQUEROR' is last seen in (current on site) advertisements in 1929, this Case is Dated 1932.
Also, did the 'CONQUEROR' evolve into 'CYRANO' or were both produced concurrently?