Got this from my father-in-law after his passing. It’s a Kbar but I don’t know what time period. I don’t see any markings on the blade it self but on the metal sheath it’s stamped “USM8Al”, with “PWH” stamped smaller. Any help aporeciated.
And from Wiki..
[ The improved M8A1 scabbard manufactured later in WW II has the M1910 bent wire hook. The scabbard throat flange is stamped "US M8" or "US M8A1" on the flat steel part along with manufacturer initials. Some M8 scabbards were later modified by adding the M1910 hook. Later M8A1 scabbards were manufactured with a modified extended tab on the web hanger to provide more clearance for the M5 bayonet which rubbed against the wider bayonet handle. This sheath is correct for all post-war US bayonets including the M4, M5, M6, and M7. It was also used with the M3 fighting knife.]