We have a large lot of Exhibit Supply cards that we found in unopened bricks (you can see a picture of some of the bricks at the top of this department (Trading Card Shop). They are from a closed penny arcade. This is about the only way you would ever be able to find complete sets. The problem still is that there are more of some cards than others, so we can't assemble as many sets as you might think. These cards are uncommon. They are difficult to date because many of the machines were in production in the 1930s and 40s, but Exhibit Supply made cards for many of them all the way up to the early 1970s. The tale end stuff generally used lighter colored cardboard backing and printing on the bricks was stamped. The older ones have separate printed labels. So, we are using that info and the aging on the brick wrappers to estimate dates. The arcade must have bought the bricks of these during different time periods. Some are the light backs and some are the darker backs. We'll call it circa 1950s as some of these bricks are really old.