perpetual calendar
- n a chart or mechanical device that indicates the days of the week corresponding to any given date over a long period of years
perpetual calendar :
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- Chopard and Patek Watches Fetch $461,000 At Sotheby's
An 18K white gold and diamond Chopard limited edition tourbillon watch and a Patek Philippe automatic minute repeating perpetual calendar tonneau sold for $461,000 to lead Sotheby?s final watch and clock auction of the spring season in New York.
June 11, 2013 - Forbes