Either I don't know how to read the books are I have found an unlisted $25 green large key chip from "Sturgeon's - Lovelock, Nv." Campiglia & Wells only list a $2 and $5 largekey. The chiprack only lists the same two chips in largekey. The scan is not that good but one side has a good hotstamp the other is worn. It also is not flat the center has an indention (dip) about the size of a dime. I need some help with an id on the airplane $5 Large crown.