This is an interesting one I picked up recently. My gut is telling me it is a 1934 Bulova Maxim based on this 1932 ad. It is a white gold plated hinged case which has a broken hinge and is in two pieces. The case serial number indicates a 1934 model. The movement is a 10AN 15J with an omega 1930 or 1940 date code. I believe the dial to be original and assume that the dial differs from the 1932 ad due to modernizing the dial on the later year models. The crown is clearly a replacement. We have only one other example in the db which is a black dial two tone. So I am thinking 1934 Bulova Maxim with a replaced movement.
Other example in the db. https://mybulova.com/watches/1932-unknown-5823?page=0