my fillet brazed ~'53 Hobbs is at http://flickr.com/photos/8210984@N06/2902418104/in/set-72157600201279047/ Dave's '63 fillet brazed Schwinn Superior is at http://i29.photobucket.com/albums/c298/koskid/DSC03729.jpg
Some details are vey similar:
fillet brazing pencil seat stays seat cluster treatment
I wonder how far back this design goes?
Amir AvitzurRamat-Gan, Israel