FRENCH DIAMOND GUILLOCHE ENAMEL PENDANT WATCH: Platinum and 18k white gold pendant watch with blue guilloche enameling and diamond encrusted foliate filigree center and edging. Works and case both marked Haas, works marked Swiss 17 jewel, adjusted 5 positions, serial #51793, case serial #75446 with French eagle and Mercury stamps, 18K, plus rhombus centered with unknown symbol. Watch with chain to bail approx. 2 3/4'', on a platinum (assayed) link chain set with single diamond, 19 1/2'' plus 2'' dangle from diamond to latch attachment for watch. Early 20th century.