Stamped M - for mistery. Is it Holdsworth Cyclone?

Foreigner

Senior Retro Guru
An old push bike :)

Serial 20407 on left rear dropout and fork steerer, where there is also A&P stamp and also letter 'M' opposite the serial number. M for mistery? Hope not for murder.... :oops:

Badge rivets spaced at 57mm. Lovely lug work. Single braze on for DT shifter. Simplex rear dropouts. 27.2mm seat pin. Can it be HW? If so is it Cyclone?
 

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Nice lugwork! I don't think it's a Holdsworth, the lugwork looks too fancy. Unless you know of one that's got the same lugs, of course, but I think it might be more distinctive and pointing to a smaller maker. This is the sort of frame you used to be able to identify by trawling the frame builders pages on Classic Lightweights looking for a match on the lug details, but it's difficult now the site has a new format.

A&P is probably Accles and Pollock, who were the tube manufacturer. Don't know about the M, it could be a maker's mark by the frame builder.
 
Nice lugwork! I don't think it's a Holdsworth, the lugwork looks too fancy. Unless you know of one that's got the same lugs, of course, but I think it might be more distinctive and pointing to a smaller maker. This is the sort of frame you used to be able to identify by trawling the frame builders pages on Classic Lightweights looking for a match on the lug details, but it's difficult now the site has a new format.

A&P is probably Accles and Pollock, who were the tube manufacturer. Don't know about the M, it could be a maker's mark by the frame builder.
A&P - yes it is Accles & Pollock, M is the mistery I don't know about. Serial numbers correspond to one of three makers mentioned above and year 1955 seems correct too. Lugs not sure, but I read 55 was when Nervex was used for Holds for the first time, some extra handwork was asked from frame customer perhaps?
 
M apparently Monsoon model, lugs certainly look same to me
 

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