IWC Schaffhausen Portuguese Perpetual Calendar - Coutndown to the Next Full Moon

Apart from the date, day, month and year in four digits, the Portuguese Perpetual Calendar also shows the number of days remaining until the next full moon. The moon's progress as shown by the watch deviates from its actual course by just 12 seconds each lunar period, an impressive accuracy. Learn more about this masterpiece made in Schaffhausen.

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