As George mentioned German police, Railway, Postal and other paramilitary organizations, who fielded armed troops inside and outside of Germany, equipped them with rifles and bayonets just like the Wehrmacht. Manufactured for governmental organizations Waffenamts = German Army inspectors that along with serial numbers clearly indicating Wehrmacht ownership. With “commercial” bayonets normally lacking both, although at least on some early examples they might have some kind of group or organization marking.

As far as German Police issue black Bakelite gripped bayonets by Coppel go there seem to be three markings variations: “ACS”, “ACS inverted” and “AWS”. Typically as George also mentioned with something like an Eagle/D or Eagle/F (very often hard to read or interpret) on the spine. As a group many of the “commercial” bayonets IMO seem to be scarcer than many of the military issue examples. FP