I am trying to remember but I think the 52, 52A and 52B may sometimes develope a small crack at the safety. You do not need a safety on this type of gun and the crack does not hurt the function of the gun. BUT!! You need to look becasue it does reduce the value. All 52 carry a collector value if they remain original, WITH NO EXTRA HOLES drilled and no crack.
A literate person can do an afternoon reading or couple sessions and get up to speed on the 52. A gun club is great place to make friends and get the word out that you are looking. Gun Broker is the worse place. Good for the buyer working long hours and busy at home. Old guy. back in the game, meet more old guys getting out of the game.