That one looks very close to one I found and was restored by a good friend (OutdoorAdv)! Mine actually had a copper wash over iron which I was surprised to see. Turned out that wash was often used as cheap preservation. Let me see if I can find a picture....
It does seem ridiculously large, doesn't it? I've been finding a lot of oxen shoes at this site, so maybe it was for an ox. Glad you guys had some fun with this one!