[iRIGHTi]

Look like NOS 1942 250 rounders. Do not turn them pink!

 

[iRIGHTi]

I'd leave them alone as far as soaking/treating and just use a 1918 loader to load them. I've never treated a cloth belt and have dozens of them, from 250 rnd NOS to green used 1940 50 rounders. Just a real ***** to load NOS the 1st time without a 1918 loader.