A Platinum and Diamond Surprise Wristwatch, Oscar Heyman Brothers, the hinged dial cover and bracelet containing 28 round brilliant cut diamonds weighing approximately 2.00 carats total, ten baguette cut diamonds weighing approximately 0.48 carat total, three square step cut diamonds weighing approximately 0.38 carat total, and 86 round single cut diamonds weighing approximately 2.55 carats total, 22.00 x 13.00 mm case dimensions, matte white dial, applied dot and Arabic numerals, blued steel baton hands, rectangular case, hinged dial cover, snap on case back, Cal. M46 17 jewel manual wind movement signed A. NICOLET, double row box link bracelet with foldover clasp. Stamp: PLAT. 72816.Inner case back stamp: (Maker's mark for Oscar Heyman Brothers) 72816 PLATINUM. 23.40 dwts.