Lot of 131 different. 1930s. Each is about 3x3" and cards in this series feature actual picture panels from Big Little Books which have been mounted to same size cardboard sheets. These were produced for a number of different characters including Mickey Mouse (see display sign item #2983), Dick Tracy, Phantom and others. Sold in vending machines as well as offered as gas premiums. Flash is featured on many cards, along w/a host of friends, foes, space creatures, rocket ships, etc. Great assortment of images from at least two different BLB's. Each reverse has text "Flash Gordon Series/Penny Cards/Esso" along w/card number. It appears as though pictures were randomly applied to the card backs w/no real semblance of order as there are 13 duplicate card numbers in this lot but no two BLB pictures are duplicated, therefore all are different even though there are these duplicate numbers. Card numbers are: 2-5, 7-46, 48-77, 79-88, 90-121, 123-124. The duplicated card numbers are: 101-103, 107-109, 113-115, 117-120. Typical aging as mounted but overall cards are still NM w/sharp corners. While we have offered small groups of these cards in the past, this is far and away the largest group we have ever seen/offered.