Mooh, you probably know this but the Superswede is very different from the Swede despite looking similar at a glance. I've never measured it but I'm told the pickups turned out about 3 volts, which for the time was just gigantic. From the front the giveaway is the zero fret on the superswede. Body shape is also a little different. from the back it's the cover plate over the fixing bolts on the Swede neck - the Superswede had a set neck.

Now the differences between the various Hagstrom J-45s (and other serial numbers for the same guitar, and the Bjarton - badged identical ones interest me far more and I am gradually learning. So far there are the tailpiece ones and the pegbridges, the set necks and the bolt ons, and definitely two different bracing patterns in the pegbridges. I'd like a complete set but no-one knows how many variants there are because when the Bjarton factory closed down the records were lost and there is no known serial number list...

I've also seen string trees on some but I don't yet know if all the bolt-on necks had string trees rather than angled heads...

Oh shit, now I want to buy another one....