Watchmakers Branch Out into Matching Jewelry

Women in possession of a dazzling watch have long had trouble figuring out what jewelry to wear with it. Now there's an easy answer: pieces designed by the watchmakers themselves. Audemars Piguet has reinterpreted the design of its popular Lady Royal Oak watch—an octagon dial with diamond screws—as a ring, bracelet and pendant in a sporty new collection that uses rubber in shades of white, black and chocolate brown ( Franck Muller, who's known for his Crazy Hours Color Dreams dial concept featuring sharp hues and out-of-sequence numbers, remains true to form with a funky, feminine ring collection that incorporates diamonds crafted into backward and upside-down numbers. The line has expanded to include bands for men as well as women (from $2,500;

To complement his bold but simple watch with hearts on its face, Roger Dubuis has created the My Heart diamond line, which includes a pendant and a chunky, heart-shaped ring that looks uncomfortable, but fits on a tilt, smooth and snug (from $2,700; Omega's enchanting jewelry portfolio features earrings, a seahorse charm and cufflinks that flaunt the brand's trademarks, including its unmistakable Greek alphabet logo, a modern interpretation of the signature claws and claps of the constellation watches, and the wave elements reminiscent of the Seamaster watch collection. Now there's no excuse not to accessorize a great timepiece (