http://www.datamath.org/Speech/ElLoroProf.htm <- isn't that the 'later' super speak and spell from 1991 (both are tsp50c series based); IIRC there are two 'types' of super speak and spell, one with a more squarish case (1989) and one with a case closely matching the original speak and spell (1991). The mcus and lcds on the two are different; the 1989 lcds are 2 lines (and tend to die, have a poorly designed contrast knob next to them which is easy to destroy), 1991 are 1 line.
"When life gives you zombies... *CHA-CHIK!* ...you make zombie-ade!"