I've listed a very nice set of mid-1970's Cinelli handlebars & matching stem on eBay. Both items are in near mint condition. What is particularly unique is the stem is the slightly smaller 22.0mm diameter, which typically fits French frames (and maybe others?). It's 110mm in length, measured center-to-center.
The old style Campione del Mondo bars (model 63) are 40mm wide, measured center-to-center.
If anyone has any questions, please feel free to contact me off-list.
Thanks
Item# 190330947914
Mark Winkelman
Dallas, Texas USA