Originally Posted by
rosieochiltree
I have measured the frame bits and you seem to be correct in your assumptions - I think:
The internal diameter of the BB is 35mm (external 39/40) and the width is 67mm.
The headset seems to be just over an inch at 30mm but that might be my bad measuring?
I got the same bb shell measurements on a fillet brazed viscount. I tried to measure carefully because someone told me that the max shell id for a vo grand cru threadless bb to most likely work well was 34mm. The id is probably smaller inward of the bearing space so maybe it would still work. I think those are really lite and nice frames, worth fixing up if you can figure out the bb.