Peter
You dropped on a good one here!
My Evian(GB)lLimited catalogue lists and illustrates loads of different
models which includes small and large flange, all steel barrels and
large flange in forged Dural, single/gear fixed, solid axles ,hollow axles
for Simplex quick release mechs, supplied for all models for roadsters
to racing bikes alike. The majority were made in 32 and40 hole flanges.
Distributed in Great Britian on national scale and were available in British
and French and Italian threading and dimensions. They were produced to
manufactuers own specification on request.
Not sure what country/area the actual manufacturering was done?
Thats about really, I hope it is of interest and help to you.
Doug smith
North Dorset
UK