I found this PP1-2 sight in the US of all places. The PP-1 was the sight used for most of the Russian 45mm antitank guns. It is my understanding these are very hard to find. The PP1-2 is for the 57mm ZiS-2 AT gun, and the PP1-3 is for the M1942 model 45mm guns with the longer barrels with higher velocity. I have the Russian manual showing these variations. All of the units look the same - only the reticle, name plate and ballistic operation internally is different. You have to estimate the range, then adjust your sight with the dial for that range before firing. The gun had a round peg coming off the sight mount, and that peg fit into the hole in the side of the sight. If you absolutely must have one of these for your 45mm or 57mm Russian AT gun; I am willing to let it go.
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