My Gun Is Quick

A private detective (Robert Blay) helps a prostitute being assaulted, and notices that she is wearing a unique ring. She is later found murdered and there is no trace of the ring, which turns out to be part of a cache of jewelry stolen by the Nazis during World War II.

This is apparently what a B-movie film noir looks like. No actors whose names mean anything to me (including star Robert Blay). Made by United Artists, and then acquired by MGM. Now probably sort of in limbo from the financial mess of MGM...

But you know what? Low budget or not, lack of star power or not, this is a pretty good story with a cool detective, some ladies of the night, shady characters...