The four-pin radio was made in 1978. The five-pin version was made in Taiwan from 1979 to 1989. Then in the Philippines from 1989 to the mid-1990s.
Age matters. A radio that's 43 years old is not necessarily better than a radio only 25 years old. Mileage matters when age adds up. Newer tends to be more reliable. And there will always be someone who gets nostalgic about a 1979 car. Says it's better than newer ones. But only if somebody dug down deep and covered the cost of upkeep.
It's not just the years it's the miles, too.