I believe my watch is from the 30s, maybe the tank style. When I open it up, the symbol is something in between a triangle and a circle, so that really isn't much help. It is 17 Jewel Adj 7AP, case serial number is 9341714. Please help me!
I'm pretty sure that this watch is a 1938 (or there abouts) Minute Man. I have a low-res vintage ad that shows a watch was the same dial and shape case. I'd list this as a 'Minute Man'.
As for the for exact date, can you get a better picture of the movement or describe what the date code symbol looks like. My serial number database shows the 7AP starts at 1937 and continuing through to 1941.
In reply to I'm pretty sure that this by Stephen Ollman