A Cob Is It Real Or A Later Forgery>

Not great pics. A little mushy and not much patina, which sort of raises the antennae some for a cast repro (lots of "Atocha era" casts out there - this later assayer B, CA. 1600, falls in that period)... but nothing overtly obvious. Decent chance of being genuine, but wouldn't offer a concrete opinion from just this. Weight plus more/better pics.

PS - Obviously rather round and a pretty nice strike... but that's not necessarily suspicious as a decent amount of Potosi of this era come this way.