As Hans said, we always suffered from lack of translation for the early Japanese catalogues. And enquires to Tokai seem to fall on deaf ears.
When I first came here there were several guys who?d actually bought Tokais around that date, 1978-82, & probably knew some of the info first hand, but they?ve slowly drifted away to pastures new ? I?m thinking of Loverocker & Supernout, but Peter Mac may also know first hand. I can only make a guess based on what I?ve seen over past few years.
I think early LS 80 always came with Gotoh ?PAF Vintage MK-1? pickups, & originally all with chrome covers (ie 1978-1980). LS100 & above definitely got Dimarizio or SD pickups. The Dimarizios were exposed double cr?me with hex-pole adjusters (ie from 1978) ?that?s all in the catalogues.
Believe lower models LS50 & LS60 also fitted with same Gotoh PAF-Vintage MK-1, & maybe with chrome covers at first in 78. But by circa.1979-80 LS50 always seen with exposed double cr?me pups (maybe same for LS60?). As Han?s said, those pups usually have normal slot-head adjusters, but are also quite commonly seen with Hex adjusters ie looking like the Dimarizio?s - seems like both those double-cr?me Gotoh?s are PAF Vintage MK-1 (ie supplied without covers as standard).
By 1981-82 LS60 is regularly seen with new Gotoh PAF Vintage MK-2, which is exposed zebra. Believe LS80 had same Gotoh PAF Vint. MK2 in 1981-82, but I think originally with covers. As you say, the early Gotoh's are often stamped on the base in black ink "GOTO Patent Applied For" or similar wording. :-?
Ian.