WWII USN Mk 1 Training Bayonet, measuring 20.5" overall with a blade length of 15.75".  These were made in the 1940's for use by the Navy.  It has a metal tang and a black plastic blade. The blade is in fine condition!  The guard and muzzle ring are also plastic, and in excellent condition.  Excellent working press-stud.  The pommel shows some light surface scratches.  These were issued with a USN Mk1 Scabbard, this one is in excellent condition. Tang stamped, "U.S.N MARK 1"  Opposite side stamped, "P.B.& Co." with an alpha numeric code, "NXSO-17249". I normally see these with broken guards, blades and sockets, nice to see one intact and in wonderful condition. See photos for further details, clarification, and condition.  If you see one in better condition, BUY IT!