Unfortunately, it's unknown. No number or code on the bottom bracket,
just the info that it was sold at Tony Butterworth and the framebuilder was
from the Sheffield region.
It's a quite nice 531 frame with lovely t-rex dimensions (ST 60.5 c-c, TT 56.5 c-c)
and Zeus dropouts.
Unfortunately, it's unknown. No number or code on the bottom bracket,
just the info that it was sold at Tony Butterworth and the framebuilder was
from the Sheffield region.
It's a quite nice 531 frame with lovely t-rex dimensions (ST 60.5 c-c, TT 56.5 c-c)
and Zeus dropouts.