Dr., would the front head in the pic be the original? Kind of confusing as to when Slingerland changed to the thicker, modern script - after the sale in 1980(?). The Super Set-O-Matics suggest pre-1982 (?). They appear to be 5-plys.
Would this be a factory 'beta' kit? The serial numbers suggest 1979-80ish, as do the standard dimensions - I'm guessing of course (this is where you come in!).
What a fabulous looking kit... If it had double-headed toms, I'd be very interested. Expensive, but its a big kit.
cheers!