Very nice find. This Super J was the last run of Super J's. built in 1978 The differences are that the last run came with a 5 year motor warranty because the earlier Super J's were prone to have bad armatures. Also, the inside of the bag door is powder coated gold instead of the usual cast aluminum color, the gold colored hose was also on the last of the Super J's as was the new style sheath, with the cut out in the front to remove the lower wand without disassembling the sheath from the wand. Shortly after his model was released the first generation of Olympia One's came out in 1979, they were essentially the same machine but painted ginger brown and the power nozzle was no longer polished it was painted ginger brown also.