Sylvania Chassis Research

[TUD1]

I'd like to learn more about Sylvania color chassis nomenclature. Since Sylvanias seem to be quite uncommon, I know very little about their chassis numbers. All I really know is that they had D line and E line, and the D12 is a hybrid from 1969. I'd über love to find a D line remote set. My 1974 Solid State Sylvania is an E08. I'm kind of assuming that D line is tube, and E line is solid state? An explanation of the years and chassis numbers, would be highly appreciated.