It's a little hard to make out with the lighting in that photo, but I'd say you have basically the same colour as mine under the pickguard - white.
As there appears to be no grain visible then it's alder. IMO it's Olympic White but without seeing the guitar personally in bright light it's hard to be sure. As a poly topcoat, it has no clear - mine doesn't either. Judging from mine at least, the paint seems very reactive to light, even though mine sat in it's case in storage for years.
That colour was originally a GM Cadillac acrylic lacquer (acetone thinner) from Du Pont but during the 60's fender changed it's paint formulations - a lot. By 1970 it would probably be some sort of polyurethane.
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Olympic White Lucite 2818-L 60-80 1958-62 Cadillac
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Fender based colours on Du Ponts chips but bought paint from whoever had it in stock cheapest - there may be little consistency between two guitars supposedly the same.
Fender made bodies and other parts in batches - it is not impossible that body was around for a year or more before it was mated with a neck, and the paint seems quite photo-reactive. If it hung in a dealer's window for six months it might explain why it is not a straight white.
The Tele bible lists the official colours, and in the period between about 1960 and 1983 Olympic White and Sunburst were officially Custom colours but so many were made it appears they might be the most common after Blond and Black which were the standard listed options.