I'm at a loss,the more I look at the 2 pcs.,sizes,wear patterns(or lack of)and etc,I'm not 100% sure these are the original mates to each other,or it may just be my eyesight(or lack of it),good pics,just really hard to tell,I've had a few US and CSA buckles down thru the years but i've never been a collector of them but looked thru several books on them,I've never seen that particular buckle before(but that means nothing),need a real collector to jump in here and give his say so.

RayP.