I'd just like to thank all the collectors who replied to my post. My gut feeling is that the green cover copy is the first printing, due to the lengthy intro about collecting. I still have to locate my black cover copy for a side by side comparison. So far it's been running about 50/50 for ownership of each copy. Joe Maurath, Brent Burger and his buddy Marcus purchased copies as new collectors. Bill Meier, myself, and Bud Johnson all own the black cover issue. Dave Kingston had not heard of either one, and he's been in the hobby a long time! I don't think there was a third printing. If anybody has additional info, I'd be glad to hear from you. Thanks!