My farrier friend sent another reply, that me as a blacksmith thinks makes the most sense. He says
“As crude as it is I would lean towards it being an unfinished set of ox shoes. They probably were going to cut all that extra toe off and separate each individual side but it would be easier to get to this stage leaving it together.”
This makes a lot of sense to me. Those shoes were made from a larger bar that was split down the middle, because that would be quicker than drawing it out. He didn’t cut them off all the way (yet) because it would be easier to work this way, as well as work both halves at once.
As well as, ox shoes normally have the nail holes closer to the edge of the shoe since they have a thinner hoof wall compared to horses that have the nail holes closer to the center of the bar.