I think this Union pull-chain design, a very competent copy of a Huret from the 1950s, is the earliest of the Czech derailleurs in this collection. It is clearly a close relative of the Favorit (1st style), but the black finish on the small parts smacks of immediate post-war shortages of fripperies like chrome for plating. Despite (because of?) this, it is a solid, well constructed, item and the small parts are accurately machined.

Strangely the branding is upside down - unlike the later Favorit version.

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• Derailleur brands: Union
• Country: Czech Republic - Czechoslovakia at the time
• Date of introduction: 1952?
• Date of this example: unknown
• Model no.: unknown
• Weight: 238g including integrated hanger plate
• Maximum cog: 24 teeth?
• Total capacity: 22 teeth?
• Pulley centre to centre: 46mm
• Index compatibility: friction
• Chain width: 1/8”?
• Logic: low normal
• B pivot: none
• P pivot: sprung
• Materials: steel

Ref. 393