In the late 1980s and early 1990s Campagnolo produced a bewildering array of derailleurs that all looked extremely similar. This poses the perfect puzzle for derailleur geeks who can endlessly debate exactly which is what.

I think that this well-seasoned derailleur is an early example of a Campagnolo Record which may possibly have had the part number R010. I guess that it is a Record (R010) because it has ball bearings in its pulley wheels and a hex cable clamp bolt. I speculate that it is an early version because it has a spring adjuster on the p-pivot. There is probably someone out there who knows for sure - if that someone is you, please let me know!

A list of relevant details might include:

• There is a spring adjuster on the p-pivot.
• The cable adjuster is round and threads straight into the aluminium of the b-pivot.
• It has a double parallelogram spring using ~1.5mm wire.
• The inner parallelogram plate is a stippled aluminium pressing.
• The cable clamp nut is a hex nut.
• The pulley wheels are Campagnolo's typical ball-bearing design, in black.
• The inner pulley cage plate is aluminium and has no spoke deflector.

• Derailleur brands: Campagnolo
• Categories: Campagnolo - the good stuff
• Country: Italy
• Date of introduction: 1990
• Date of this example: unknown
• Model no.: R010?
• Weight: 255g
• Maximum cog: 26 teeth (Sutherlands 6th edition)
• Total capacity: 26 teeth (Sutherlands 6th edition)
• Pulley centre to centre: 46mm
• Index compatibility: 8 speed
• Chain width: 3/32
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: aluminium