Old Ned wrote:
Are we sure it really is a Holdsworth? Fast back seatstays, vertical rear dropouts, Nervex pro lugs, flat fork crown? Did they make a model with these features at that time?
Whatever it is it looks an OK bike and the tyre clearances under the rear bridge and fork crown look to small for 27" wheels to me.
I would use a pair of 700c clinchers for L'Eroica with as big a sprocket on the rear that you can get the gear to work with!
I was trying to avoid a debate about what it is...rather trying to help the OP with what was suitable rim-wise and brake-wise.
As a general point about Holdsworth, the"shop"bikes could have been built to any specification, in fact my own Mistral does not conform to any published catalalogue spec - it is a Mistral...but one with a few bespoke
Even the (post 1975) factory frames/bikes were not always to catalogue spec', my other, later frame is not.
P.S Ned, I did do the Anjou this year - did you? Am back again next year too, it's a lovely little event and not far.
Co-founder of a V-CC section, member South Eastern Road Club and owner of - 2005 Bianchi Reparto Corse (modern), 1985 Raleigh SBDU Pro Super, 1984 Raleigh LU Corsa, 1980 Allin Stan Butler Special, 1978 Ron Cooper, 2 x 1970s Roberts, 1975 Bill Philbrook tourer, 1966 Raleigh Superbe Roadster 1964 Allin Stan Butler Special Belgique, 1951 Hobbs of Barbican S/C, 1950 Hobbs of Barbican S/C, 1947 Hetchins Super Special, 1908 Centaur Featherweight.