I believe you are correct.
These can still be bought brand new. War time ones have a few different details.
Searching for anything relating to, Anton Boos, 934 Stamm. Kp. Pz. Erz. Abt. 7, 3 Kompanie, Panzer-Regiment 2, 16th Panzer-Division (My father)
Thanks Ralph , I wonder who was peddling these With the ss stamping ?