10/6/21 - This is an original WW2 Luftwaffe Gravity Knife. The blade is excellent and very clean with a SMF maker stamp on one side. The visible small parts are matching numbered "3". The wood handle has a name "G. Weber" on one side and "Berlin" on the other - likely from the Vet who captured this piece. The spike is Luftwaffe eagle/5 proof stamped and also in great shape. Fully functional without issue opening or closing.