Open up the front and look at the model number. If it's a 1401, it's a Super J. If it's a 12xx (I don't remember the exact model number), it's a it's a Golden Jubilee. They also had stickers on the outside that can give you a clue. If it's a Golden Jubilee, it may well have a blue sticker on it commemorating Lux's 50th anniversary. If it's a Super J, it may well have a sticker on it that says "Super J", at least mine does.