I have seen the early Campagnolo brakes, (the ones with the plain, no-lettering caliper arms) come with an adjusting nut #2007 that has a 15.7 mm width, as well as a 13.7 mm width. I don't know if the set that I have that has the narrower nut is original to the set. I *thought* that it was original, until I acquired a set that has the wide nut, (the nuts both say, "BREV.CAMPAGNOLO"). The #2009 adjusting screw looks the same in both versions, but the widest part is a couple of tenths of mm's wider on the one that has the wider nut.
I really want to know, of you folks out there who have these early brakes, which version adjusting nut do you have, wide, or normal, and how confident are you that it's original to the brakeset.
Please respond to all- thanks
John Barron
Minneapolis
http://www.velostuf.com