Alfred, Daniel Rebour had a drawing of a Weinmann brake in 'Le Cycle' in
October 1948. He drew wingnuts and rims shortly after. I had always thought
Weinmann to be much later than this too. It looks very like the Universal as
you say but the drawing is so small no writing is visible. I have a pair on
a 1956 Ephgrave that I know to be original. The stamped logo is larger and
clearer and not surrounded by a sunken box as on later types. They are a
classic design. I believe Fiamme handlebars have been around since the '50's
too.
Mark Stevens Evanton Ross-shire Scotland