Yeah that should be an '85. My guess would be 400, since I picked up a pair of 400's on CL and this looks so close. Mine is the beige/bronze/plumish color like this one, but my wife's mixte is the exact paint scheme as yours. I could be wrong it paint colors were shared across models. I could probably tell you for sure if you knew what the derailleur model was (mine's either a Z503 or Z505, I can't remember).