Lambertsen rebreather's fullface mask, 1944, with eyeholes Front view of frogman swimming with Lambertsen rebreather, 1944 Lambertsen rebreather with mouthpiece on neck strap, and eyes-and-nose mask, 1944 Underwater Demolition Team Operations U.S. Navy video demonstrating the Lambertsen rebreather National Archives #76869 Rebreathers Office of Strategic Services