Thanks for the replys. Just needed to know if they were display box or junk box material!
I'm sure those type clips are moslty post CW. They used a few tyes of spring clips during the war for carbine slings.
Then during WW1, a different type of clip was used mainly for the M1 Garand scabbards.
I've found both types at CW period sites.
Here's a few pics for reference.
Happy hunting.