US NAVY MARK V MORSE DIVING EQUIP. INC MASS USA KNIFE US NAVY DEEP SEA DIVER. I’m not an expert, but I think this is from 1993. I have the original box and there seems to be a date code on it (THIS LISTING DOES NOT INCLUDE THE ORIGINAL PACKAGING – JUST THE KNIFE & SHEATH). It is in new condition. Please reach out if you have any additional info about this item.