3/4/21 - This is an original WW2 Luftwaffe gravity knife. Made by SMF and fully functional. The release lever is numbered, as shown in photos. The blade shows signs of sharpening and use, making this a cool piece of living history. There's mild surface scratching on the blade as a result. The wood handle has no cracks or chips. The releasable spike is luftwaffe eagle/6 proof stamped on the base.