A no-messing Shimano Skylark copy - right down to the black plastic caps covering the main pivots.

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1. •Brand: SunRace
   

2. •Country: Taiwan
   

3. •Date of introduction: 2001?
   

4. •Date of this example: unknown
   

5. •Model no: M15 SB?
   

6. •Weight: 286g including hanger plate
   

7. •Maximum cog: 28 teeth
   

8. •Total capacity: 26 teeth
   

9. •Pulley centre to centre: 56mm
   

10. •Index compatibility: 5 speed?
    

11. •Chain width: 3/32”
    

12. •Logic: top normal
    

13. •Pivots: two sprung pivots
    

14. •Material: steel
    

0374/M