Originally Posted by
unworthy1
a few anomalies: two sets of water bottle bosses, the DOs might be Japanese, and have had eyelets shaved off. Pretty sure the over BB shell cable routing is original so guessing that the second WB bosses were added. So if you say there's some stamping on the steerer that confirms Reynolds 531 and has fork and frame numbers that match then this probably is 531 thruout, what size seat post? Does (or did) the fork ends have eyelets? Would be curious to have a brand for the DOs and forkends and does it take nutted brakes versus Allen head bolts? Is the pinchbolt metric or Imperial/SAE? My gut is leaning to "American" or "British" but jury is out.
I honestly think the bosses were added after, possible before powder. According to the seller he believed the serial to be # of frame built, size (61cm), year (79), and initials of customer TA. All speculation.
BB and steerer do share same serial. Reynolds 531 is clear for steerer, but fork blades could be a different tubing all together as far as I know. Takes 26.8 seatpost, so that could be a 531 variant or easily some Japanese sourced tubing. Collar area looks like it might be pinched slightly, so possibly 27.0? I'll update as I play around with the frame. Takes metric binder bolt and British threading.
Yes, eyelets have been shaved. Cleanly on forks, by my eyes and less so cleanly on the rear dropouts.