A no-messing Shimano Skylark copy - right down to the black plastic caps covering the main pivots.
- Derailleur brands: SunRace
- Country: Taiwan
- Date of introduction: 2001?
- Date of this example: unknown
- Model no.: M15 SB?
- Weight: 286g including hanger plate
- Maximum cog: 28 teeth
- Total capacity: 26 teeth
- Pulley centre to centre: 56mm
- Index compatibility: 5 speed?
- Chain width: 3/32”
- Logic: top normal
- B pivot: sprung
- P pivot: sprung
- Materials: steel