Here is another preTSR module to gets it start at a Metro Detroits Gamers (MDG) tournament.
The other tournament modules to debut here include Ghost Tower of Inverness
and Lost Caverns of Tsojconth.
Both of the Van De Graafs were very active in the MDG. This edition was later revised, expanded and released by TSR as O1 Gem and the Staff.
Apparently this was reprinted by MDG for some reason with a differing amount of pages from the more commonly seen print.
This item went for less then $200 several years removed from now. In 2005, three individual copies turned up and sold for around $1,500 each.