What kind of place did you find this at ? Ie.: what type site ?
I found a supposed CW buckle once, at a historic site. However, it turned out to be a replica. Believe it or not replicas have been around since the early 1960s. Made/manufactured because, as you know CW re-enactment nostalgia/history buffs have been around since even the 1960s. And the site I found something similar at was also the location where re-enactments had gone on.
But there are tell-tale marks that experts can spot to tell the difference. But so long as you weren't hunting a spot where re-enactment pageants and stuff goes on, yours is probably the real deal. Nice find ! Welcome to T'net.