Founded in Switzerland in 1873, Landeron acquired the patents of Breitling and began producing chronograph movements in the 1920’s. The Landeron calibre 48 family (of which no 248 belongs) is one of the most popular chronograph movements ever made, with more than 3.5 million units produced between 1937 and 1970. These movements ended up behind dials of various brands, oftentimes in chrome plated cases which don’t age well. This BWC however is solid stainless steel in original unpolished condition. The central chrono sweep hand is blue. A real gem.