That board was sold by all electronics sometime in the early 90's. I know, because I bought several of them. It was some kind of electronic scrabble game. Pretty sure it's this:
I pulled the 14 segment displays and ULN2804's off the boards for re-use and the balance is long gone. All electronics had a habit of selling weird stuff like that; I bought three brand new super a'cans from them for $4.99 each in the late 90's.
Sean has that one too, and his has a Panasonic MN1405 MCU. What MCU is on yours?