Sean: A surprise TI Spelling B* and Mr Challenger are on the way *1978 or 1980 version? I don't know, that's a surprise too I guess?
Spelling B showed up today. No serial # on the back, but the date code is 0479 and the copyright date is 1978. There are 2 chips: 40 DIP TMC0272NL DAS 7901 SINGAPORE and 28 SDIP TMC1984NL DAS 7849 SINGAPORE. 5 caps, 5 diodes, 2 resistors and a transistor. VFD is 8 digit, 14-segment plus decimal point and apostrophe.