SINN rare deck watch Double Face, gold-plated... Lot 3304

SINN rare deck watch Double Face, gold-plated metal case on both sides glazed, gilded dial with Roman hours, blued steel hands, display of hours, minutes and sweep seconds, movement gold-plated, 20 jewels, base calibre Unitas 2812, fausses cotes decoration, compensation- balance, Breguet balance-spring, swan´s neck regulateur, diameter approx. 57 mm, original wooden box, watch rate certificate and purchase invoice from January 1990 enclosed, condition 1-2, property of a collector