Thread: Help me ID this Holdsworth
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Old 03-08-23 | 09:38 PM
  #4  
fvernon
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Originally Posted by machinist42
1975.

Likely Cyclone Because Dropouts, so Plain Gauge 531.
Campagnolo dropouts and the seattube has a 27.2mm ID. A plain gauge 531 would take more like a 26.4mm seat post, wouldn't it?

Thanks for the heads up on the year!
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