Like four.cycle said, that knife might be a prize bit....[ ]...Some similar knives bring a hundred bucks or more. Or it might be borderline worthless.
That knife looks similar to the knife from my Dad
Where did he get it and when? It could be very old. It could be pre-production or early production. It's a Kingston, and that marking on the bale, along with the "U.S. MARINE CORPS" marking, is consistent with very early production tells! Does it say "PAT PEND", just like that, under "C
ANO
PENER", squeezed together just like that, on the can opener blade, and nothing but "USA" (no name, no date) on the tang of the main blade?
Hard to tell about the OP's red paint splattered one - the marking would be on the flip-side scale. Could be a common Camillus "US".
Known in collecting circles as a "MIL-K" (short for MIL-K-818, the military standard designator). Most of them are fairly common, and most people, especially non-collectors, and almost everyone who ever served or who had someone in their family serve, are familiar with the Camillus version made from 1957 well up through the 2000's, But they were in development, not yet issued, as far back as May 1944 (by the Marines!) then in early 1945 (by the Army Infantry Board) and eventually standardized across both services and produced in late 1945, and those are more precious. Camillus started making them in 1949. Everything I know about the early versions I learned from the OP of our
'Show your Vintage Knives' thread down here on the Vintage Tools Discussion forum, who has a much more detailed timeline in an excellent and well-researched study on them. Can't remember if he posted it there yet or not, but it pieces incomplete bits together from Cole, Trzaska, and period government documents.
I carry a '63 Camillus that I got from my Great Aunt, an original 1943 W.A.C. and lifer who retired in 1973, and I have a few others in glove boxes, a toolbox, and given to my sons. It's my favorite carry knife. Hard to beat stainless steel, indestructible, comfortable grip, and handsome in a "camping" friendly 4-blade style.