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Standard R531 Butted frame built in 1979 in Ti Livery in Carlton factory Worksop. It is a nice frame indeed, with its cut-out lugs or the semi wrap around seat stay caps. As for the parts, the bike has a very fine equipment. it’s still a quality built frame just not SBDU status
So it's not a SBDU (Raleigh Specialist Bicycle Development Unit) but it's a cool bike : )
Gaston
jeff80
SBDU?