A. Lange & Söhne 1815 Rattrapante Perpetual Calendar
The A. Lange & Söhne 1815 Rattrapante Perpetual Calendar unites the technical fascination of a split-seconds chronograph with the enduring precision of a perpetual calendar. The Ptolemaic geocentric system is visible in the background. It postulated that the earth was the immutable centre of the universe until the theory was superseded by the Copernican revolution in the 16th century.
>>> Discover the Datograph Perpetual on page 4