Could someone help me in identifying some proof markings on a 1939 Luger S/42. Serial 6619t I have included pictures of the markings. The mark under the release toggle/lever appears to be a sunburst with the letters "Kell" offsett underneath it.
The proof marks are three I have not seen before, the only one that is really clear is the last that looks like a "K" and a triangle or the letter "A".
Thanks.
