- Derailleur brands: FM
- Country: Portugal
- Date of introduction: 1981?
- Date of this example: unknown
- Model no.: unknown
- Weight: 259g 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. 1338
