The only rule that Tokai guitars have is that there will always be exceptions. This could be one of them
The Tokai stamped saddles indicate that the tremolo will not have a steel block on it. However it does indicate that it's an early Tokai.
One ply pickguard usually implies a top of the range model ST-80 or above, but the pickups are U series not E Series. The top line models had the Di Marzio made pickups with E stamped on the back.
I can't quite work out from the photo's whether there are 11 holes in the body and that the 8 hole pickguard is a replacement.
The wood is alder and not Swamp Ash or Sen as were again used on the top models. This is consistent with the ST-60 description.
It's got well matched grain paterns on the body. I can't easily spot a join to work out how many pieces the body was made out of, cool.
Again it's not a top model as the string tree isn't round, it's the tyical 60's W type.
I wouldn't worry about the shape of the control cavity my 1980 ST-100 '54 model has the very same shape.
The electrics look to be untouched from new too. In fact the guitar looks to be a 'Closet Classic'. It's in remarkable condition.
Serial number is consistent with those from 1981
From some of the photo's you could argue that the paint looks to have the characteristics of Nitro, that misty look and sunk into the grain. If it's poly is a very very thin application.
Peter Mac is in my opinion 'The Expert' on the early Strat copies
Very nice looking Springysound at a very reasonable price. I'd go for it but I've already got 6 Japstrats - Have I invented a new word ?
Japstrat = Good tone, value for money, well made by experts