http://www.thewatchbox.com An automatic power reserve watch has been a fixture of the Jaeger-LeCoultre model line at nearly every point in time since 1948. This Master Ultra Thin Reserve de Marche is the latest descendant of the original caliber 481 "Powermatic" of the late 40s. The Master Ultra Thin Reserve de Marche debuted at SIHH 2012 with an overall diameter of 39mm against a girth of only 9.9mm. The thin caliber 938 in-house movement combines automatic winding, a power reserve function, a radial date, and the entire assembly measures only 4.9mm thick. This Jaeger-LeCoultre Master Ultra Thin Reserve de March is the ideal option for enthusiasts who seeking a versatile watch that can pull double duty in short sleeves and dress cuffs alike. Now available from thewatchbox.com with full Jaeger-LeCoultre factory paperwork, manuals, packaging, and accessories (including date pusher), this Master Ultra Thin Reserve de Marche is the picture of traditional elegance and outstanding condition. Video and content by Tim Mosso.