It is hard to be sure about the eBay example from the picture alone. The obverse is not in very good shape, which could be intentional in order to hide something. Plus it looks like the obverse was shot at a bit of an angle, which doesn't help. I would be very hesitant anytime I was considering this type from eBay, especially at the price it is listed for.
p.s. the flan crack does not look at all right, more like what you would expect to see from a cast.
