I thought these buckle protectors post-date the CW & its a another case of an urban myth/mis-ID?It's a civil war era harness buckle shield. Horse hardware.
But you still think they are CW period? My memory is not great but I thought we dug out a post-war patent for these.They are not blanket roll buckles. That was a misprint in an old relic book and the misinformation just won't die.