The rare bike will be offered at The Canterbury Auction Galleries on September 4-5, with a guide price of between £30,000-50,000.
Only 144 Series D motorcycles were made in 1955 and matching numbers show SXW 606 was one of the final 38.
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The machine was purchased new by Johnnie from Conway Motors in Shepherd’s Bush, who registered it for him in July 1956. It has covered 54,129 miles and among a raft of documents and photographs to be sold with it are MoT certificates from 1967 to 1989, the last one showing a mileage of 53,968.
In addition to retaining its original registration number, the motorbike also has both old and new V5 registration documents; tax discs from 1979 to 1990; numerous service bills, insurance certificates and Vincent Owners’ Club dating certificate. The only major modification from standard are the original but polished engine cases, minor recommissioning work has been carried out by Kent Classic Motorcycles; it now runs well.
For further information, please contact Dave Parker or Tony Pratt at The Canterbury Auction Galleries on 01227 763337 or email [email protected]