Each about 2.5x3". All are 1930s. First is card #3 from the Big Little Book series. Title is "Flash And Dale In Vultan's Box." Trace of margin aging, slightly rounded corners with other light corner tip wear, top margin has a very faint 1.5" crease that barely shows through to the back of the card. Art remains clean. VG/Fine. Second is gasoline giveaway (these were also issued in vending machines), reverse has "Esso" imprint and also marked "Flash Gordon Series/Penny Cards/No. 89." Card front features actual picture panels from a Big Little Book mounted to same-size cardboard sheet. Many different characters were issued in this series. Lightly tanned with age, Exc. Final card is from a series of 12 issued to promote the Universal serial starring Buster Crabbe. Features film scene on front, reverse text includes title "The Tunnel Of Terror." Scattered light corner creases at right. O/w clean and VG/Fine. All 3 card fronts prominently feature Flash.