I have a Puma "Jagdnicker nach Oberforstmeister Frevert" which I bought in 1960 at Waffen Bock on Berlinerstrasse in Frankfurt/Main. It has a 'bag shaped' blade, wider at the tip, not like the Linder blades your posts show. It was boxed with an accompanying booklet showing the way to 'nick' and the 'Ausfurhung' or cleaning of 'Wild' (wild animals.) I carried it as a survival knife on many Air Force missions. A similar but larger and less well appointed style was sold extensively here in the US by Puma under the name 'Hunter's Pal' and 'White Hunter' in the '70's and '80's.