Ontario USMC Prototypes?

[porterkids]

pwcosol is pretty much right on, but the Ontario designations were OKC 1FT (tanto blade), OKC 3FT (blade similar to the OKC 3S) and OKC 6FT (Kabar style blade). All of the bayonets had the USMC Eagle, Globe and Anchor silk screened on a small oval on the grip. There were some later OKC 1FT bayonets that had US Army markings on the grip, and these were soon after followed with the OKC 1FTS with the serrated blade.