This is an excellent condition example of the U.S. PAL RH 34 fighting knife, manufactured by the PAL Cutlery Company..
While PAL was originally a manufacturer of pocketknives, but after the Remington acquisition they expanded their range of products to include a variety of fixed blade knives as well. PAL received a number of US government knife contracts during World War II and produced thousands of combat knives during the war years. Pal went out of business in 1953