If I got the correct information from Google, this is an Ulster Dog Leg #183 Jack Knife. The handle is made from Bonite.

The Vintage Ulster 2 Blade Pocket Knife is a classic collectible folding knife. Made with carbon steel blades under 2.75 inches in length, this ambidextrous manual pocketknife features a black color handle and plain blade edge. The handle is made of bonite material, adding to the vintage charm of the original Ulster brand. With a slipjoint lock type and two blades, this pocketknife is a coveted piece for knife collectors and enthusiasts alike.

The knives has been used and needs a through cleaning and some restoration (rust removal and repair) work. However, that is something I will leave to the buyer.