I have this guitar for at least 30 years , but never found out which brand.Nowadays I believe it could be a Teisco '68 EP-1T,although the neck can't be found on any Teisco I've seen.The brand tag is missing,but the fixing holes are still there , with a distance of 40mm(or approx.1,6 inch).
The tremolo,neckplate and the bridge states Japan,also the Cosmos potentiometers(Cosmos Tokyo PR-18)
And they"cheeted"with the pu : only half of the housing is filled,it's only a single coil.You can also find additional drawings on the Welcome page !
Another remarkable fact is that the neck is fixed wit 5(five)bolts,instead of the usual 4!
OK!found a S-60 1963 Kawai(who differs from the four Kawai's on the welcome page:this one has a "semi"-set neck(only two hidden bolts and a glued neck)) with the same five-bolt neckplate.So this one must be Kawai/Teisco !
Only the model number to be determinated....!