Vacheron Constantin caliber 4400/1

4400/1 Developed and manufactured by Vacheron Constantin Mechanical, manual-winding 28.6 mm (12’’’½) diameter 2.8 mm thick Approximately 65 hours of power reserve 4 Hz (28,800 vibrations/hour) 127 components 21 jewels Hand-engraved caliber on front and back with "acanthus leaves" pattern (copper-plate and champlevé)