Rob Goughary asked about the early Campagnolo dropout screws. Here is a link to a pic of my 1953 Gillott ''Continental'' which has these screws. http://www.flickr.com/photos/makfreak/2884802393/in/set-72157607474080721/
So still in use then. I would aslo like to know when the changeover happened. I guess it was because the larger diameter led to bent or broken dropouts? Mark Stevens Evanton Scotland.