1989 Campagnolo rear deraileur was the old fashioned type with the same basic shape as Nuovo/Super Record, not the modern dropped parallelogram type.
So...probably 1990, not 1989.
the correct rear derailleur shape is the one Lemond Fan posted. The only thing I can see that is potentially wrong with his derailleur is the missing cutout at the top of the outer cage. I'll need to check catalogues to confirm, but either his derailleur is earlier than 1990, or it's a Chorus/Athena one, not C-Record.
picture of the time pedals.
They are dirty from years of storage. I reckon they'll clean up nicely though.
ANTHO, you have a great bike collection. I like the period 92-94, and mainly collect around that era. It was the era of introduction of the Campag Look clipless pedal, the cartridge bottom bracket, double pivot brakes, Ergopower, Shamals, and lots more. I notice you have a Red Colnago Master with a crankset that has been milled and filled with enamel in the Italian flag colours. Interesting crankset. I remember seeing one sold by Ebây seller triall11trial, and then resold by seller CampagnoloSR. Apart from that one it's the only one I've seen. I plan to make a replica version on a milling machine, but if you can tell me anything about the history of your one, or that pattern, I'd be very interested.