These were SPECIFIC to the Biber Midget Submarine used at the late stages of the war. The Biber (German for “beaver”) was a German midget submarine of the Second World War. They were the smallest submarines in the Kriegsmarine. The Biber was hastily developed to help meet the threat of an Allied invasion of Europe. Made of brass and steel, this valve is in EXCELLENT condition for it’s age. It is 100% complete, there is some corrosion and slight wear/marks, but nothing that detracts. Some of the original paint and coloring remains. This was one of 4 valves used in the submarine for either the Ballast Tanks or Torpedo Release. Should clean-up quite well. I have shown its location in the last photos. Ould make a PERFECT addition to any collection or display!