I was looking at older bikes and frame for sale at WWW.bikeworksnyc.com and there is a frame they state is from the 1930 It is called an Edge Mass Start the photos show rear drop outs made for fixed gear or a derailleur with a built in hanger for a derailleur it also boasts a brazed on shifter boss. I was under the impression braze on mounts for rear derailleurs and shifter bosses were much later than the 30s - was this a one of a kind? Thanks for any responses - I was hoping this could start some discussions of 1930s racing bicycles.
Sam DiBartolomeo in Southern CA