Pre 1950s rides of LFGSS: old bikes, vintage rats, classic lightweights

I've always found Weinmann 500's perfectly satisfactory. The earlier type with the domed nut at the front of the spindle would be less noticeably anachronistic than the later type with the plastic 'shroud'.

You'll be in good company - I'm pretty sure Alf's sub 50 minute bike used them.