Originally Posted by
capnjonny
more detail
top tube 25mm
down tube 27mm
seat tube 27mm
bb serial no. GBH 0013
bb threads 37 x 24mm
all this seems inaccurate:
if the tubes are METRIC then the dimms should be even number mms: 26 and 28, if they are Imperial then fractional mms 25.4 and 28.6 (= to one inch and 1/1/8 inch)
and that theading spec is
either Italian which SHOULD be 36mmx24tpi OR it's BSC/BSA/ISO in which case it's 1.37" x 24tpi