Nice machine!
Look at the date code on the serial number it is the first four. I consider that machine fairly rare as the medallion is on the lens, not the base. Looks like a Sears Brand Central model to me. Circa 1988,1989,1990.
Hope it gets gentile use, as I think that would be one to collect. I would of bought that machine, except for getting married and I need the money. Good find!