There are no 6.1 or 6.2mm 10 speed chains made anymore. Campy changed to 5.9mm back in 2007.

About the master links, KMC makes a special version for the Campy UN chain. Othere that fit, with the proper side clearance are the SRAM 10 powerloc and the superlink model 4. The superlink model 3 is a little wider across the inside, to fit Shimano, KMC or Wipperman chains.

The current Wipper connex link should be a sloppy fit on a Campy or SRAM 10 chain. To be sure, check the side clearance with a feeler gage - .004-.008 inch is ideal and .012 tolerable. .016 is too sloppy.