On Saturday November 12, 2011, I had a conversation with Roger Le Roque, co-author of Disneyland Postcards – A Complete Checklist and Historical Guide about the existence of these cards; it appears no one has ever seen them. My question was where the information about the cards in the check list came from? On page ii of the Complete Checklist and Historical Guide, the “acknowledgements” list several individuals and companies that contributed to the guide. Among them is Mike Roberts of Mike Roberts Color Productions who, coincidentally, was a personal friend of Roger’s uncle. Roger states orders are placed for a product but sometimes the product is never completed nor delivered. It is quite possible this is the case with these cards. Disneyland could have placed an order for the cards and for some unknown reason the order was neither produced nor delivered. So it appears these cards can be listed as “not known” until such time as one or all of the cards surfaces.

UPDATE: On Thursday July, 26, 2012 I aquired several Jumbo postcards. On the backs were numbers written in ink; the numbers were J 1755, J 1764, J 1765, J 1805 and J 1808. A couple of them were also stamped "SAMPLE, DO NOT REMOVE FROM FILE". I discovered these cards were from the files of Mike Roberts of Mike Roberts Color Productions. According to the original checklist and historical guide, Mike Roberts produced cards 0483 through 0492 as well as J-4 and J-8. H.S. Crocker Co. and Colourpicture Corp. produced numbers 0461 through 0482. As shown below, I beleive these are five of the missing "Not Known" cards I have redesignated earlier. It is my belief Roberts was prepared to produce these cards but for unknown reasons, did not follow through.

There are 10 cards in this set, not counting the variations.