Given the date & descriptions the "other" set was probably the
new CTC 175,176,177,185,186,187 family of chassis. These
were the sets with all the cold joint problems.
The set shown was an earlier low price set. They were a very
good set & a pleasure to work on. Sry I dont remember the
chassis ##.
One bad thing was the non remotes. The button keys were part
of the cabinet front & broke off. IIRC the cabinet net $75 but
you could swap it out in 5 mn.
73 Zeno
LFOD !