obgzus

Hi All,

I recently bought a bike with a lovely vintage frame, but no decals, or other markings to let me know what it is.

I've done some digging on here and think it might be a 70s Cinelli, or Windsor due to the 3 holes on the lugs, but further research hasn't turned up anything that looks similar:
https://www.bikeforums.net/archive/in.../t-182214.html

It has a cutout BB Shell as well, which might help narrow it down?

unterhausen

I think it's a homebuilt. Neither one of those brands would have done that cutout or drilled every socket of the BB shell.


Moved here from framebuilders

repechage

A few makes had variations on that bottom bracket shutout scheme.
To narrow it down a bit, what are the threading specs of the bottom bracket shell?

unworthy1

never seen any make with that (extreme) BB shell cutout. It's not a Cinelli or a Windsor...there were a few other brands that mimiced the Cinelli 3-holes lug pattern, but don't think it's one of those either (Fuji was one). Custom build likely.

repechage

Harry Quinn did basically the same primary cuts in the mid 70's but not the hole in between.

dbakl

looks english.

unworthy1

I've never seen a Harry Quinn, but sounds like that may be the direction to look. Maybe the OP will tell us whether it's BSC threading...

JohnDThompson 

The seat cluster is wrong for either Cinelli or Windsor. As others have noted, the 3-hole lugs were widely used by many builders. It's a trivial modification to a plain lug at the time of building, and some lug suppliers, e.g. Nikko, would even drill the holes for you.