That he had made a custom piece at Cartier, so actually a piece unique and on the back it reads also just No 1, like this one and like mine. So to be a unique piece, it doesn’t need to have 1/1 on the back to be unique.
that they are not unique pieces. On the back it reads no 1 and not 1/1. Mine was made in a run of 7 pieces, as a special order for a client. So I think this one is a special order too and probably made in a really small amount, like mine. Interesting is that there is no ruby in the crown, but a sapp