This is a plausible copy of a Shimano Tourney (TY22 possibly - they have all become a blur) from our funky friends in Ningbo.

• Derailleur brands: Saiguan
• Country: China
• Date of introduction: 2003?
• Date of this example: unknown
• Model no.: HG-23
• Weight: 339g including hanger plate
• Maximum cog: 32 teeth?
• Total capacity: 36 teeth
• Pulley centre to centre: 85mm
• Index compatibility: 7 speed
• Chain width: 3/32”
• Logic: top normal
• B pivot: sprung
• P pivot: sprung
• Materials: steel

Ref. 373