I had the chip below on eBay. There was a bidder at $225 with a couple of days to go. I never mentioned ivory, scrimshaw, bone or any other word that might alert eBay. eBay just cancelled the auction. I imagine someone ratted me out.

Anyhow, I would sell the chip (first two pics) for $245, delivered. As far as I know, only two known.

The chip is a new code. The third pic is the known, coded chip

Chip is large (over 40.mm)

By the way, I would trade (English ivory passes, riverboat chips, something interesting)