Also worth noting that there are hundreds and hundreds of these type of trays, all decorated differently. The anomaly is that while the minimum order quantity was just 250 - which most companies would probably go for - they are very limited in appeal due to the esoteric nature.
So whilst they can often be "rare" they are not necessarily collectable except to those people who are interested in the respective historical values. For myself, I have dozens of the more interesting and older ones, but I can't always distinguish known Chance ones from any other makers.