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 thoroughly abused derailleur, with its unusual Graphite finish, 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 single parallelogram spring using ~2.0mm wire.
• The inner parallelogram plate is a steel pressing.
• The cable is clamped by an Allen nut.
• The pulley wheels have plain bearings and are black.
• The inner pulley cage plate is steel and has a built-in spoke deflector.

• Derailleur brands: Campagnolo
• Categories: Campagnolo - mountain bike madness
• Country: Italy
• Date of introduction: 1990?
• Date of this example: unknown
• Model no.: Q010-MD
• Weight: 308g
• Maximum cog: 34 teeth (Sutherlands 6th edition)
• Total capacity: 38 teeth (Sutherlands 6th edition)
• Pulley centre to centre: 69mm
• Index compatibility: 8 speed
• Chain width: 3/32
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: aluminium with a steel inner parallelogram plate and inner pulley cage plate