So there might be on the inside of the set more valuable information than displayed from the outside? Well the only hint I can recall from my father is that he bought the TV set in 1984. But that's not efficient enough for someone to claim that it could be also been manufactured on that same year! It could have been a model from the previous year or a stock model...
https://www.vintage-radio.net/forum/...1&d=1558818489
This is the original remote control of Mitsubishi CT-1425QTM it has a slot at the front of the TV set in which it's inserted and exserted by a push! I guess there were many TV sets built in the 1980's having that hatch!