508 Art Deco Platinum, Ruby, and Diamond Pendant Watch, Tiffany & Co., the red guilloche dial with Roman numeral indicators, enclosing an 18-jewel manual-wind Ed Koehn movement, no. 7879, the case and bezel set with fancy-cut rubies and red enamel accents, suspended from a red cord with diamond-set platinum trim, together with a diamond initial pin framed with fancy-cut rubies, lg. 1, 28, and 1 3/4 in., in later fitted box. $10,000-15,000
509 Platinum and Diamond Element, Gattle, set with a step-cut diamond weighing approx. 1.09 cts., further set with marquise- and single-cut diamonds, approx. total wt. 3.70 cts., millegrain accents, with later 14kt white gold finding for clasp, lg. 2 1/4 in., signed. $6,000-8,000
510 Platinum, Pearl, and Diamond Necklace, the pendant set with a transitional-cut diamond weighing approx. 1.75 cts., old European- and single-cut diamond accents, cultured pearl highlights, millegrain details, completed by a baton-link chain spaced by plaques set with old European-cut diamonds, lg. 1 1/8 and 16 in. $4,000-6,000
512 Platinum, Ruby, and Diamond Bow Brooch, channel-set with forty-four square-cut rubies, single-cut diamond mĂŞlĂŠe accents, lg. 2 1/4 in. $2,500-3,500
513 Edwardian Diamond Crescent Brooch, Tiffany & Co., set with old European-cut diamonds, approx. total wt. 4.20 cts., platinum-topped 18kt gold mount, lg. 1 1/4 in., signed. $4,000-6,000 514 Art Deco Platinum and Diamond Solitaire, set with an old European-cut diamond weighing approx. 0.78 cts., single-cut diamond accents, engraved details, size 5 1/2. $1,000-1,500 515 Art Deco Mother-of-pearl and Diamond Brooch, France, designed as a rose-cut diamond fish and dragonfly, on delicate platinum wire waves, rock crystal ground, and mother-of-pearl border, platinum-topped gold mount, lg. 1 1/2 in., maker’s mark and guarantee stamps. $400-600
511 Pearl, Ruby, and Diamond Bracelet, designed as a crown set with old single-cut diamonds and circular-cut rubies, joined to a bracelet of platinum and old European-cut diamond bars, ruby beads, and pearls, lg. 7 1/8 in., one bar signed Tiffany & Co.; together with a pair of earpendants. $1,200-1,500
Online bidding at www.skinnerinc.com
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