a lot of collectors will dismiss these ,especially the Police , right away.

Seeing how these are made these are very early rings. Probably pre-war

The NSBO and Luft. are well known period original patterns. Not many have seen the POlice one but it sure follows the method,construction, etc. of the others.

I would have no problem with that Police. And, I'm sure there is a Heer and other patterns..