Etablissements of Cycles Allegro Arnold Grandjean SA Neuchâtel
Founded in 1914 by the cyclist Arnold Grandjean, 4 times Swiss champion, with his brothers Ali, Ulysse and Tell and another companion. The company was the first manufacturer of racing bicycles in Switzerland and by 1939 had become the largest bicycle manufacturer in Switzerland. The 1980s saw merger with Mondia.
Allegro bike in Rydjor Collection HERE
Wikipedia entry about Allegro HERE