At risk of stating the obvious, Weinmann"Vainqueur"centrepulls, CTC reviews (by the technical officer) still regard these classic brakes as amongst the best for a tourer - still.
People are snooty about them but they're very good - remember the pros BITD used to race with these.
They're cheap too.
You'll need 750s or 610s depending on clearance.
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.