The 5513 and Connery’s 6538 are linked by lineage and so are superficially rather similar, but to an aficionado, you'll find differences. For one particular, the 5513 was by no means CSOC Licensed, which means it didn’t officially qualify as obtaining Swiss timekeeping precision and precision. Blood Oxygen application measurements https://www.watchesworld.com/from-sean-to-daniel-tracing-the-evolution-of-james-bonds-iconic-watch-collection/