I was unable to locate a similar knife. To me this resembles one of Marbles Trailmaker knives.
The blade is almost 1/4 thick. Blade length(tip of blade to finger guard): 10-1/4.
Rare Vintage Jacobs & Co Grafrath Solingen Stag Bowie Hunting Knife" is in sale since Thursday, August 31, 2017. This item is in the category "Collectibles\Knives, Swords & Blades\Collectible Fixed Blade Knives\Vintage Fixed Blade Knives\Factory Manufactured".
The seller is "prettyimpracticals" and is located in Perkiomenville, Pennsylvania. This item can be shipped to United States.