Stainless Steel, Oyster bracelet (SEL) with Oysterclasp and Easylink extension link, domed bezel, black index dial, automatic Chronometer (Cal. 3131), screw-down crown; anti-magnetic to 1000 Gauss, 'Parachrom Bleu' hairspring, Ref. 116400, 40mm, Mint in Box (no papers)