A diamond and sapphire 'nail-head' watch/bracelet, by Boucheron, Paris, circa 1940
The square dial set within the rectangular 'nail-head', accented by calibré-cut sapphires and an applied 'H' motif, held by a pavé-set old brilliant-cut diamond 'slip-knot', on a highly articulated double strap, mounted in platinum and gold, signed Boucheron Paris, French assay marks, diamonds approximately 3.00 carats total, sapphires approximately 3.00 carats total, circumference 15.5cm