Finally, here's a gun with a Detroit story to it.
This is a CZ 27 with Nazi markings on it. Most likely brought back from the war by a Detroit Vet. It comes back "clear no record" which means that the vet never got it registered. It was recently found inside the wall of a Detroit residence under going reconstruction.
The only thing that I can think of is that it was most likey stolen from the Vet's home on a B&E, used in a crime and then stashed in the wall but never retreived. Interesting.