10AE.... 7 Jewel Movement?
Didn't know it came in a 7... but I popped off a back of a watch I got today.... looks like a mid-1930's Ranger but with engraved bezel. It's got those weird wavey steps.
Double date stamped Arrow and Crescent Moon for 37-38. Anyway.... low and behold.... a 7 Jewel, 10AE movement.
Case is stamped correctly Bulova inside btw.