Starting my SBDU collection with a frame lacking an SB number! Yes, this frame is in pre SBDU territory and was built at Raleigh’s Carlton facility at Worksop. C4619 is a Raleigh frame dating to 1968. The frame is also stamped with the number ‘948’ which indicates a custom build.
The problem with this frame is that I don’t yet know what it is… Is it a Giro D’Italia or Carlton BMB frame, or does it link to the Raleigh Ruberg team… or is it even a prototype for the Raleigh Professional MK1?