multimodal commuter
Join Date: Nov 2006
Location: NJ, NYC, LI
Posts: 19,808
Bikes: 1940s Fothergill, 1959 Allegro Special, 1963? Claud Butler Olympic Sprint, Lambert 'Clubman', 1974 Fuji "the Ace", 1976 Holdsworth 650b conversion rando bike, 1983 Trek 720 tourer, 1984 Counterpoint Opus II, 1993 Basso Gap, 2010 Downtube 8h, and...
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The oil port on the BB would be on the shell, that is the frame, not the bearings; you would have seen it by now if it were there, so I'll assume it's not. So the frame is very likely from the 1960's.
The fork serial number should be visible too, so I'll assume it's not there.
I'm not familiar with Carlton serial numbers, so I'm hoping someone else will comment on that.