• Yeah the SBDU used Cinelli bb's. Mine has the same one as pictured. This frame looks to have been resprayed at some point so the number is barely visible unfortunately. However it does have a few special build characteristics in the seat stays/cluster and bb. My bet is on this being a very nice Worksop built frame. The serial numbers tend to be across the middle for Worksop, and starting in W, whereas SBDU normally run parallel with the edge of the bb, and always start with SB as i'm sure many are aware of.

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