Old-School "Pogs" From 1963

When pogs became popular in the 1990s, there were children of the 1950s and 60s who immediately recognized them as new versions of an old relic...the milk bottle cap. Though the concept of caps that could be used in a game predated pogs and even milk caps (Japanese Menko games have existed since the 1700s, for instance), it was still a quaint reminder of a time when local dairies delivered milk bottles to doorsteps and advertised on the cardboard caps that topped their bottles.
 
And that brings us to today's set:

In 1963, a Cincinnati-based dairy known as French Bauer released a set of 30 milk caps that encouraged their clients to visit Crosley Field and see the team play. The 1 1/4-inch diameter discs are blank-backed and feature a die-cut area and a staple that were designed to be broken open to allow the milk inside to be poured out. Predictably, not many of these have survived and examples are a little scarce today.

Two caps are especially prized by collectors: a Frank Robinson and a rookie-year Pete Rose. However, the bottle caps weren't only limited to players. One cap even showed the image of team owner (and long-time baseball executive) Bill DeWitt:

Though considered a common in the set, there weren't a lot of kids excited about old men in suits. Especially a man who later traded Frank Robinson to the Orioles because he felt Robinson was "old." That makes the DeWitt cap one of the tougher commons in the set.