Sorry I don't have a picture for this, but maybe it will sound like something you're familiar with. Simplex rear derailleur. Bigger and appears older than the Tour de France, but it has the same chain and collapsible spring. The cage that holds the smooth pulleys is about 1.5 times bigger than on the TDF. On the front of the derailleur is the word Simplex, beneath that -TIPE CHAMPION DU MONDE-, beneath that -MADE IN ITALY. On the back is an oval with GBA in it. What do I got. Art -going through the shed for next week's swap meet-Smith Phoenix