Regarding the tubeset steel type, the 1956 BueHag of which I am a custodian & have dispatched oodles of winged fowl, it clearly is stamped „Special Weapons Stahl S? Simpson(Script)“ and I cannot discern what the character is after the >>S<<?? But the character following the >>S<< is not a >>G<<.

The 1962 BüHag reads the same but omits the Script >>Simson<<.

I will dig a bit on the steel stamps.

Hochachtungsvoll,

Raimey
rse