Matchbox Pre-production - 25-pc CRAYOLA SET one-of-a-kind! - (Mint). This set was commissioned by Crayola but never approved. There is no other set like it in the world. It was auctioned off years ago at one of Charlie Mack's Conventions, and the winner later sold it to Alanstoys. It is now being offered for sale for the first time in many years. Serious interested parties may send us an email for pictures of all 25 models.