There are a fair number of oddities in 19th century glazed mibs, I suspect it's due to the variability of the glaze chemicals and the kiln heat. I have a few black ones (maybe ballot-box mibs), green ones, a couple of pink ones, etc. I don't think of them as bennies if they don't have the bennington "eyes," but that may just be me. They're all probably made in very much the same way. Paul Baumann singles out the pink ones (no "eyes") as being called American majolica, and I'd be perfectly happy with that, except I'm worrying over the fact that I got mine in Germany . . .