Komfit Forstner and JB Champion used by NASA for Astronauts Speedmasters
Vintage JB Champion 15.6 mm watch bracelet w/ctr expansion and leather insets | eBay
Hands-on: the new Forstner "Komfit" JB mesh bracelet
Historical Perspectives: The True And Sad Story Of J.B. Champion, Jr., The Man Behind The Most Expensive Watch Without Complications Ever Sold At Auction - Hodinkee