I'd say the Stumpjumper prototype is classic. It's steel, it's lugged, and it's got a TA Cyclotourist (I wonder if that was the crank Specialized originally installed on the prototype. . . .). And since it's early-80s, it fits the time frame, which an MB-1 doesn't.
Wish the seller had posted pictures rather than asking potential bidders to write for them. (I wonder how many e-mails he'll receive before the auction's close?)
It'll be fun to see what everyone thinks about this one!
nath dresser spring green, wi (where winter has returned. . . .)