I do indeed post here on occasion, although not as often as I would like. Those coins are quite rare and unlike most other Topps presentation pieces, which are often just mockups or artists renditions and not a true, discrete object, the coins are production items since the had to be molded (or cast-I have never handled on so can't be sure). I would think at least 3 or 4 of each type were made and am still curious about the ones with holes. It would not be like Topps if there were only 1 or 2 of each as most of their tough in house production pieces exist in quantities of 4 or more, although not all do (such as 1970 Cloth Stickers).
For the curious, my blog posts on the Coins can be found here:
http://toppsarchives.blogspot.com/se...seball%20Coins
PS-Al is being modest; he knows just as much as anyone when it comes to Topps test and proof issues.