The Shimano Lark is a Skylark with the cable clamp bolt mounted on a sprung ‘cable saver’ arm. I have always liked this feature as it gives a pleasant supple feel to the gear change.

I think this example is the second version.  The difference from the first style is that this Lark does not have the screw pulley cage stop.

This example has clearly put in a good few miles - but is still perfectly usable with tight rivets and lively springs.

____________________________________________

1. •Brand: Shimano
   

2. •My category: Shimano - from Skylark to world domination
   

3. •Country: Japan
   

4. •Date of introduction: 1969?
   

5. •Date of this example: 1970? (date code is P12, ‘333’ marking on pulleys)
   

6. •Model no: unknown
   

7. •Weight: 356g including hanger plate but excluding drop-out bolt
   

8. •Maximum cog: 28 teeth
   

9. •Total capacity: 28 teeth
   

10. •Pulley centre to centre: 54mm
    

11. •Index compatibility: friction
    

12. •Chain width: 3/32”
    

13. •Logic: top normal
    

14. •Pivots: two sprung pivots
    

15. •Material: steel
    

0197/F