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
JB Champion Stainless Steel 18mm Flex Bracelet #5450 - Pieces of Time
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