The Centaur was launched in 1989 as a lower cost alternative to the 1988 Campagnolo Euclid. As far as I can tell the only difference was that the inner parallelogram plate was a steel pressing - which was presumably marginally cheaper than the Euclid's aluminium forging.
I believe that this is a first generation Campagnolo Centaur from 1989 - with no cable adjuster.
This example has the mid-length pulley cage.
Some relevant details are:
- There is a spring adjuster on the p-pivot.
- There is no cable adjuster.
- It has a single parallelogram spring using ~2.0mm wire.
- The inner parallelogram plate is a steel pressing.
- The cable is clamped using a hex nut.
- The pulley wheels are a conventional ball-bearingless design in white.
- The inner pulley cage plate is steel and has a spoke deflector.
- Derailleur brands: Campagnolo
- Categories: Campagnolo - mountain bike madness
- Country: Italy
- Date of introduction: 1989
- Date of this example: unknown
- Model no.: Q010-MD
- Weight: 292g
- Maximum cog: 34 teeth (Campagnolo)
- Total capacity: 38 teeth (Campagnolo)
- Pulley centre to centre: 69mm
- Index compatibility: 8 speed
- Chain width: 3/32
- Logic: top normal
- B pivot: sprung
- P pivot: sprung
- Materials: largely aluminium with a steel inner parallelogram plate and inner pulley cage plate