This is a used US Navy M3 Mod 0 Diving / Combat Knife Ontario Knife Co. The blade is stamped "Ontario USA" and "SPEC PLUS LSA SP-15". While the scabbard is marked with " MK 3 MOD 0 USN". Knife shows general wear from use but overall in good condition. The blade has some minor surface rust and the scabbard has markings. This knife was issued to US Navy Seals during BUD/S training and is also used by Reconnaissance Marines. Buy online today!