Metacortex
Wore out three sets of tires already!
My K0 (Oct 60) Continental is a 21" frame, it has an electro forged headtube.
Thanks for the confirmation! It appears that the FB headtube construction may only be found on the early 23" frames. It was either done all throughout production of that specific frame version (up through '62, those frames were re-tooled for a different geometry in '63) or possibly was done for only a period of time due to a problem with the 23" headtube tooling. If anybody listening in has a 1960 through '62 Varsity, Continental or Sierra with a 23" frame I'd be interested to know if the headtube is fillet-brazed as well as the serial number date stamp on the frame.