Looks Military issued? WWII possibly?

I believe that's the beloved K-Bar.

Marine fighting knife aka kabar. First issued during WWII and to date with various tweaks. Probably the most copied knife in the world.

Camillus was just one of the many, and better, original contractors.

Unless it has military provenance and/or rarity to a specific contractor/order lot it has minimal collector value. However, being made by a known quality maker, and not one of the hundreds of cheap knockoffs, it does retain value as a quality piece.

Yup, combat knife. Possibly USMC issue.



Charlie

Mine were made by KA-BAR, a subsidiary of Cutco Corp., in Olean NY.

Were Navy scabbards black? Might not be USMC but Navy? I also thought WWII USMC KaBar had the skull crusher on the butt end?

KBAR Kill A Bear was actually a marketing campaign that became a product name

the US fighting knife was first a Union cutlery , the Camillus product was to fill war contracts originally

name KA-BAR from the marketing campaign

https://en.wikipedia.org/wiki/Ka-Bar

The originator of the KA-BAR trademark, Union Cutlery Co, began using the name in 1923,[24] having received a letter from a fur trapper who had used the knife to kill a wounded bear which attacked him when his rifle jammed.[25][full citation needed] According to company records, the letter was only partially legible; "ka bar" could be read, as fragments of the phrase "kill a bear".[25][26][14][15][16][27] In 1923, the company adopted the name Ka-Bar from the "bear story" as its trademark.[24][25] From 1923, the KA-BAR trademark was used as a ricasso stamp by Union Cutlery Co. on its line of automatic switchblade pocket knives, including the KA-BAR Grizzly, KA-BAR Baby Grizzly, and KA-BAR Model 6110 Lever Release knives.[28] The company produced about 1 million knives with the trademark on the ricasso.[2] By 1944, Marines began referring to the knife as the "KA-BAR", regardless of manufacturer.[18][29] The popular designation of the knife may also have resulted from contact with Marine Corps close combat instructors in San Diego, who used the name when training recruits.[18] To capitalize on the popularity, Union Cutlery changed its name to Ka-Bar Cutlery Inc. in 1952

The Case V42 dagger had a skullcrusher.

The V42 was based off of the British Sykes-Fairburn and only issued to marine raiders.