I love this set! I provided the updates to the standard catalog so that it now shows at least two printings. Yes, there are 3 ace of spades cards. There are also sets with red checkered backs. There are also two versions of most cards, one with team logos visible, and another with the logos airbrushed.
Here is a link to my first ever post on Net54 (March of 2005) that contains some additional details.
http://www.network54.com/Forum/15365...+Globe+Imports
There is also a nice set of women nudes in the same format and a Babe Ruth (that I think comes from a movie star set).
The Yaz is the only one I never found however a dealer I taught the details of the set to, did find a few and sold them for over 100.00 each. I think it is the hardest to find and most valuable. Most of the time you can find sealed sets (usually with the more common Harrelson variant) for under 10.00 (I once bought 50 of them for less than 2.00 each).
I also believe there are more back variations than plain white and red checkered (I think there might be a blue checkered back verion as well).
Sorry for the long and rambling post. I love this set because of how cheap it is, yet contains cards of multiple stars and hall of famers.
Yours in collecting,
Alan Elefson