Mello, yes you found one. I didn't think the neck was longer though, just the scale...and the distance between the frets...i may be wrong there...
good price w that case and seller says no breaks, however the finish on the neck is a different shade than the body, and the back of the headstock looks abruptly dark (not a burst) and thus requires further inspection in my book- it may all check out ok in which this case would be a decent deal. however, the neck may have been refinished and/or need refinishing at this time (not a big deal on these- at all, imo).
1972 is early for one of these. most are very late 70s completion dates and even have the 80s "DP-8" (black soap bar) pickups- which went on *long scale* late 70s/80s Guilds. This one Mello found, has been for sale previously and/or for a while. it is possibly the only one, or one of two I have seen with the humbuckers. My thinking is the long scale bass sounded so very muddy w the Guild buckers, thats why there is so few of them. then when they started making long scale basses in late 70s (B-302, etc) they finished out the LS JS superstructures from a few years before, which were abandoned based on humbucker LS tone, and/or, simply, nobody ordered one.
so simply put, I believe the reason there are so few LS JS basses is the Guild bass humbucker. if you buy one with the humbuckers, I would definitely plan on a pickup change. with Guild humbuckers, the JS is intended to be a short scale bass, as it should be.
back to the LS bass Mello found- this would be a great unit for the Alembic Harry pickups, and for Tom Fix it Jacobs to refinish the entire guitar in the NCL stain of your choice! just need to somehow make sure the neck and headstock were never broken. is ok if it has...just at a lesser price! it might be clean though!!