I can see how it could be made for Jerry with the OBEL and the scalloped nut.
the MC5000 pictured in mkaufmann's Mr. Ibanez link has the OBEL-associated jack, so perhaps that's "standard" for all three MC5000's ... too low-res to tell about he nut.
I've just gotta get into the downstairs of the (Portland's) Roseland Ballroom sometime soon, and snap a capture that 8x10 photo hanging on the wall from 6/25/78. Been about 7-8 years since I've seen a show there... any Portlanders headed there soon? Bring your camera and find that photo in the downstairs bar.
Mike K, what's The Untold Story
, an Ibanez historical book?