IWC Watchmaker Sabrina Herzog assembles perpetual calendar module of the Ingenieur Perpetual Calendar 41 (Ref. IW344904) Developed by Kurt Klaus, this crown-controlled complication is mechanically programmed to account for the Gregorian calendar's irregularities, including leap years. It displays the date, month, day, and moon phase, with the moon phase deviating by only one day after 577.5 years. This module exemplifies IWC's innovation and mechanical autonomy. #IWCschaffhausen #IWCwatches #Watches #IWC #Asmr
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