• Derailleur brands: FM
• Country: Portugal
• Date of introduction: 1985?
• Date of this example: unknown
• Model no.: unknown
• Weight: 261g including the hanger plate
• Maximum cog: 28 teeth?
• Total capacity: 28 teeth?
• Pulley centre to centre: 45mm
• Index compatibility: friction?
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: plastic parallelogram, with steel reinforcements on the parallelogram plates and steel pulley cage plates

Ref. 784