Research notes:

Puma Bayernmesser (Nicker): Deer foot handle, straight metal fittings on sheath, blade marked with "Puma head, Puma, Solingen, 1aGusstahl" (cast steel).

Puma Nicker: Stag handle, "V" notched metal fittings on sheath, blade marked with "Puma head, Puma, Solingen, Rostfrei" (rust-free).

Research notes:

I am not sure the "Puma head, Puma, Solingen" mark is stamp. It may be that the mark is a deep etch with black letters.

The "Puma head, Puma, Solingen" mark is found with gray letters and what looks like a shallow etch and maybe later production.