Bill Owens, one of the founding members of Judges Guild, has located the oldest copy of the blueprint used by Bob Bledsaw Sr. to create the map of the City-State of the Invincible Overlord.
As I found out for myself this was not an easy project. It being sold on eBay and there are 144 copies all signed by Bill Owens and Bob Bledsaw Jr.
I haven't snagged one yet being in the midst of Christmas Shopping and monthly bill time but if there any left in two week I plan to get one myself. From the few pictures posted there appears to be small differences between this map and the subsequent product something I look forward to checking out.
City-State Map Reproduction