Thomas, this is all priceless insight to many of us!
fwiw, I wasn't referring to "Wolf"'s major overhaul during Garcia's Travis Bean period of 75-77, just the short break between spring 1978 when it still had the three strat-style pickups and July 1978 when it reappears with the Dimarzio set of humbucker Bridge and Middle + single-coil Neck.
by the way... do you know anything about the pickups "Wolf" had during the late 70's? ... or when Garcia originally got it in '73?
jeffm, , in the photo of 6/25/78, the MC500 is clearly equipped with a loop .. however I can't remember about the pickups, its been so long since I have viewed it. The 6/25/78 photo is hanging on the wall of the Roseland Theater ground floor bar, here in Portland, but I haven't been in there in several years. One day I will revisit and snap a pic of it to post.
"There, in huge black letters, was 'The Grateful Dead'. It just... cancelled my mind out."-Garcia