Thanks.
Here's another rare gunsight from the collection at Castle Jungmann.
No secret about this one--it's a USN Mark V (ignore the wood). Actual description on the casting--U.S. Navy Bureau of Ordnance Aircraft Telescope Gunsight Mark V Mod 1. What it is is not the question.
The question is--as far as I've been able to tell, it was only used on one aircraft at one gun position. And only fairly early on in the war--it was upgraded later to another sight. For full credit, name the plane and the gun position.
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