Archie A. Black had a good story whenever someone like Rich would come on the board boasting that their chip was "one of X known" that used to crack me up... He would start it with: "Nobody asked me if I had the chip...."

Granted, it's ok to boast when something is rare, but I feel the safest way to do it would me something like: "One of only three known by me" or "One of only three known by those who collect and record examples of rare chips"

Anything is better than "3 known"

JB