OSS Stiletto Fighting Knife, known as the “Pancake Flipper,” is a rare knife produced between 1942 – 1943. This was made for behind the front line members of the OSS (Office of Strategic Services). The initial production order was for only 10,000 knives, and these are very seldom encountered today. The OSS Stiletto Fighting Knife was designed off the British Fairbanks & Sykes Fighting Knife.