This is an extremely beefy and well finished derailleur. It feels too massive to put on a solo, so I would spuriously speculate that it found its way onto a tandem or two.

However, in a 1950’s world where Simplex and Cyclo Benelux gears were often considered extremely fragile, it is a pleasure to come across some good solid engineering.

____________________________________________

1. •Brand: Resilion
   

2. •Country: UK
   

3. •Date of introduction: 1954
   

4. •Date of this example: unknown
   

5. •Model no: unknown
   

6. •Weight: 329g
   

7. •Maximum cog: unknown
   

8. •Total capacity: unknown
   

9. •Pulley centre to centre: 63mm
   

10. •Index compatibility: friction
    

11. •Chain width: 1/8”?
    

12. •Logic: low normal
    

13. •Pivots: one sprung pivot
    

14. •Material: steel
    

0252/I