I believe this catalogue marks the introduction of the Campagnolo Chorus groupset. It dates from July 1987.

For real Campagnolo nerds, there are a few noteworthy points:

• The derailleurs on scan 6 have cable clamp bolts with a milled-out ring - these were typical of early 1980s mid range Campagnolo derailleurs. I have never seen these on a real-life Chorus.
• Other scans (scan 2, scan 4 and scan 7) show derailleurs with cable clamp bolts with a domed top. These are on all the real Choruses that I have ever seen.
• The rear parallelogram plates and parts with the parallelogram pivots are polished, rather than stippled grey. This may be typical of early Chorus derailleur.

• Publisher: Campagnolo
• Country: Italy
• Date: July 1987
• Derailleur brands: Campagnolo
• Derailleurs: Campagnolo Chorus (C010-SM), Campagnolo Chorus (C010-LG)