This is a Sachs-Huret Classic 2000 ATB/Touring derailleur rebranded for Kettler.

Like many Kettler bikes themselves, it is a reliable, unexciting and slightly mundane object - but has probably worked hard for many years.

• Derailleur brands: Kettler, manufactured by Sachs-Huret
• Country: Germany, manufactured in France
• Date of introduction: 1990?
• Date of this example: 1991 (coded 1391 , week 13 1991)
• Model no.: unknown
• Weight: 304g
• Maximum cog: 32 teeth? (Sachs-Huret data for Classic 3500 ATB/Touring)
• Total capacity: 40 teeth? (Sachs-Huret data for Classic 3500 ATB/Touring)
• Pulley centre to centre: 90mm
• Index compatibility: 8 speed?
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: largely steel with an aluminium b-knuckle and a plastic p-knuckle