When are too many not enough? Most of the below are WWII, while examples with red spacers will prove to be the '50s.
There are several discussions that predate my interests. My dad had one, aboard the U.S.S. Dayton. I don't know if it was issued, or he had bought one. The examples with no clip to the blade are sterile and associated with the USMC.
Wonderful knives, as far as weight, etc.
https://www.usmilitariaforum.com/for...omment-3172668
Cheers
GC