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 40 mm(or approx. 1,6 inch).
The tremolo, neckplate and the bridge states Japan, also the Cosmos potentiometers (Cosmos Tokyo PR-18).
And they "cheated" 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 with 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 ....!