This is a Puma hunting knife made in Germany in the 50s or 1960s I'm guessing. Has been sharpened and buffed in the past but overall in good shape.
Marked DBGM but could find no serial number. The item "Vintage Puma German Hunting Fish Camp Fighting Survival Knife with Leather Sheath" is in sale since Friday, June 03, 2016. This item is in the category "Collectibles\Knives, Swords & Blades\Fixed Blade Knives\Modern (1970-Now)\Factory Manufactured".The seller is "winchester76" and is located in Belding, Michigan. This item can be shipped to United States.