MULTIFORT M CHRONOMETERAdditional 3 year Guarantee Silicon Balance Spring Power Reserve Up To 80 Hours Swiss Made International Warranty DESCRIPTION The Multifort M Chronometer is distinguished by its exceptional quality well beyond the standards. Its Caliber 80, with a power reserve of up to 80 hours, is equipped with a silicon hairspring, an imperturbable factor of accuracy. The characteristic round indexes, lined with beige Super LumiNova, offer optimal readability