About the guards i dont know but i assume the camp works were organised by SS probably, so they guarded the prisoners probably too. In Steyr self was probably the Werkschutz and FW schutz which could be the helmet off.
The cof pieces have a normal finish on blades, the other 1236 was probably mashined on blade,why i dont know, certainly this is a not typical phosphate finish like seen on late war german arms. I dont believe its the origin finish.Its too dull.Have You dismantled the grips? are there any WaA under flashguard?
- the WKC of Steyr piece, the grips are not correctly fitted so i believe You have there a normal WKC blanko, that was serialed and hat got a single rune stamp,why i dont know, the grips should be normal plastic as the finish looks like 1943 piece. best regards,Andy