The most accurate wristwatch in the world. The watch made by Omega is one of the most accurate non-thermocompensated wristwatches ever made, keeping time to within 1 second in a month. This watch is from 1977, with calibre 1516 with a peerless accuracy of 12 seconds per year, thanks to a 2.4 MHz quartz circuit. Famous owners of Omega Marine Chronometers are Jacques Cousteau and Eric Tabarly. This watch was sent to Besançon in France to test their chronometer and several other tests and the average discrepancy was less than two milliseconds per day. Steel case measuring: 34 × 49 mm Serial number 37060877. The first pull of the Omega signed crown operates the hour hand only, for a quick date change. The second pull operates the minute and hour hands Below the crown is a pusher that advances one second per push. Omega steel bracelet with deployment clasp – length: 23 cm With red Omega box. Original certificate from Besançon Institute, number 115. A must buy for collectors and investors, in good condition, and in working order. Will be send by registered shipping with tracking code.