In 1949, Topps produced some of the smallest trading cards in history when it starting making insert cards called ‘X-Ray Roundup’. Issued in Pixie Bubble Gum packs and measuring just 7/8 x 1-7/16 inches, these small cards pack an artistic punch because of their flamboyant colors and fascinating detail. The set was divided into four categories: Figures of the Wild West, Indian Chiefs, Pirates of the Spanish Main, and Savage Tribesmen (50 cards per group). The set title "X-Ray Roundup" refers to the backs of the cards. When you flip the card over there is a drawing created by printing wavy orange lines on white cardboard stock. Underneath the orange picture there are, visible to the naked eye, a series of fine blue-green lines, which when an enclosed slip of red "X-Ray" is placed on top, reveal another totally different picture. This lot offers 2 complete 100-card uncut sheets (14.25" x 8.75" each), comprising all 200 images in the set. One sheet is essentially untouched, except for the slightest crease on the bottom right corner; the second exhibits slight staining on the obverse, with creases and a slight perforation on the bottom right. Both display exceptionally - if there ever was a great way to acquire the complete set of X-Ray Roundup, this is it!