Resilion Crimson Star derailleur gear

Resilion Crimson Star gears were British made and common in the early 60’s, especially on lower end mass-produced lightweights, Normans, Phillips etc. The red jockey and tension sprockets were very simple to remove.  If I remember correctly they had no cones fitted which simplified care and maintenance. The gear arm was pivoted so that you could swing it out of the way to help in wheel removal. Think you could  easily get the wheel out on any cog because of this. The toggle chain was shrouded for protection against damage (see advert scan).

The real beauty of this gear was that they would operate on either 1/8″ or 3/32″ chain and were suitable for 3,4 and 5 speed blocks. Absolute godsend for us young tandem riders when we junked our old twin wire Cyclo Standards and with a Baylis-Wiley Freewheel hub unit fitted sheer magic.

They could handle a ten teeth difference typically 14T to 24T. Chain tension was regulated by the spring on the traverse arm. The data below is from Resilion:
‘Ease the eye out of the notch in the ring inside the gear arm and turn the spring clockwise five notches from the slack position of the chain. The toggle-chain guide on the outside of the gear arm should be screwed right in for 3 speed 1/8″ and 4 speed 3/32″ gears. And screwed out until the first thread appears for 4 speed 1/8″ and 5 speed 3/32″ gears.’