Just listed the following NOS 1950s-60s Campagnolo items on eBay that in my opinion qualify as somewhat rare (single downtube cable stop for BARCON use, single bottom bracket single cable "noodle" guide, and downtube shifter clamp wedge):
Honestly don't know how the shifter clamp wedge is used, unless intended for smaller-diameter frame tubing???
Regards, Kevin Kruger - Grantville, PA
between 0000-00-00 and 9999-99-99