Thanks for the info Hilary.
I've admired GB products since first becoming aware of them in the late 1960s. It is satisfying to find that now other local "old bike" fanciers are finally beginning to appreciate my elegant and extremely strong old long spearpoint GB alloy stems, too. Unfortunately, however, this also means that they will be less anxious to make the occasional even exchange with me for say perhaps a boring yet more familiar old Cinelli 1-A stem.
Bob Hanson, New Mexico, USA
Hilary Stone wrote: I think you will find that these are all very close to metric lengths in units of one or 0.5. 1 3/4in = 4cm, 2in = 5cm, 2 3/4in = 7cm, 3 1/2in = 9cm, 4in = 10cm. GB were an early pioneer in using metric dimensions - but the English market was not ready for cm or mm so the sizes were presented in inches.