I have run into a problem while rebuilding my 1968 Atala Record which I hope the membership can help me resolve: I lost/misplaced a small washer which appears to be a critical part of the Campagnolo Record down tube shift control system. In the Campagnolo Cat. 16, this part is called a friction control plate, item #174. It is a small black washer-like item with a rectangular hole in the middle. This plate holds the control lever in place on the lever collar, and over this plate sits the cover plate through which the friction adjusting wing nut screws into the collar.
Sadly, the loss of this item creates a problem in shifting gears, and I do not wish to replace the entire shifting mechanism in view of the prices Campy parts are bringing on eBay and other vendors. Finding this part with your help with be deeply appreciated. I have checked vintage parts purveyors with no success.
Thank you for listening.