I lost my pics on an old computer.I can try to describe it simply.there is no knurling around the center hole on either side of the sprocket.it mounts reverse from standard chainrings,so the 6355 stamping will be to the inside and near the center of the sprocket.also ,it will be slightly thinner at the chain area to accommodate the thinner derailleur type chain. at first glance,it's almost impossible to tell the difference,so finding the number stamp is the best way.