I have a line on a 66-1 for a good price (but not absurdly low), is marked APD. Obviously ex-police, there are hundreds of cities with police departments which start with A.

Should I have any reservations in buying this gun? I have no reason to believe it's stolen, but I guess this is always a possibility.

Weapon is stamped with what looks to be a punch type block letter stamp APD on the left side of the frame under the cylinder. Does this detract from the value for future reference?

Anything else I should think about? Anyone with a 66 marked APD out there?