Appears to me to be a 1937 American Clipper "F", and a nice one. Inside of back marked "Bulova Fifth Ave" Caseback is gold plated. Movement marked with an arrow and s/n starts with a "7". No plating wear and a really clean face, hands and crystal. Keeps accurate time as well. Displays a multitude of jeweler marks on inside, so it was well cared for. Band is probably the 1st replacement after original and is a Speidel "Golden Knight 48". First named Speidel I have ever encountered. Band shows light plating wear on highest points. As an interesting side note; while doing research, I found a watch blog post from 2015 showing another American Clipper "F" mounted on this same (but extensively damaged) band, which I thought was an interesting coincidence.
In reply to Excessive scratching on the by Reverend Rob
In reply to Excessive scratching on the by Reverend Rob
Movement replacement never occured to me due to the matching dates. , I just assumed the watch had spent a lot of time disassembled in a parts tray accounted for the fine scratches (I figured clumsy tweezer work and tray contact marks) . Based on the brassed rub "halos" around all the screw heads and many jeweler's marks on the case back interior, it was apart and together a lot of times. Anything's possible over 80 years, wish it could talk.