One of the earliest "modern" alumnium bikes was Delage (the car maker), who made one that wasn't so successful (late 1920s, early 1930s), then came Caminargent with screwed-together production frames in the mid-1930s, and that same year Barra with custom bikes brazed from ovalized aluminum tubing. The latter really put aluminum bikes on the map. Others followed, including Hurtu. After the war, many makers tried their luck with series-produced bikes.
Aluminum bikes from Barra, Caminargent and Marcadier are featured in our book "The Golden Age of Handbuilt Bicycles."
140 Lakeside Ave #C
Seattle WA 98122
>has anybody knowledge of a site that has info on these especially looking
>for information on Mecadural, and or French bikes of the period 1920-1960 in
>p.s anybody got a pair of alloy calipers in 650B prefer the brand ROTA or
>just the rear for a late 40's Semper.