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Hope no one bought this thinking it was the 501 version, this is the boggo gaspipe version built from ATT23 Hi ten tubing, they have even just stuck a Reynolds 501 handlebar decal on the frame right above the ATT23 sticker.
Easy to tell the 501 version as they have have pantographed tops on the seat stays just like the Mirage or Montage the 531 SP version also has panto'd stays but the quality is better.