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Tag Archives: Henri Robert

The Perpetual Calendar Clock: Watch a Mesmerizing Video

On July 16th, Skinner will sell Henri Robert’s perpetual calendar clock, which was shown in the Paris Exposition of 1839. The calendar mounted in the lower section of the Belgian slate case was uniquely designed to show the year, month, day-of-the-month and day-of-the-week through the use of a single silvered dial and concentric hands, all self-correcting for the four-year cycles of leap year.