Each time they have offered the chip (they have a number of them) I have posted them advising that the chip itself is probably 19th Century ivory but the engraving is new. They have ignored me until yesterday when finally the seller asked me for verification. The chip isn't in Dale's Ivory book although it may appear in one of Kenny's supplements. So I gave them a list of people to contact for verification. It will be interesting to see what they do, if anything.