Vacheron & Constantin: A rare 1920's two colour gold Semaphore wristwatch in square case, the raised yellow bezel with Arabic quarter hour marks, the dial concealed by spring loaded shutters opened by a second winder in the band, the back secured by four screws with designers mark V F flanking a tree in a lozenge for Verger, hand stamped 12822 .3438., the movement with bimetallic balance fifteen jewels and five adjustments signed Vacheron & Constantin No. 414880, with black leather strap and deployant buckle