The original model created by Rolex in 1953 for the ascent of Mt Everest that may appeal to purists and history buffs, is just a plain steel watch with a 36 mm black dial, a polished bezel, and an Oysterlock bracelet.
The functional models in the current Explorer II line have a 40 mm steel dial in black or white, an engraved 24-hour bezel, and a red hand which, used in conjunction with the bezel, helps the wearer differentiate day from night. It also features a 12-hour hand that can be adjusted to allow for changes in time zones.
Stainless steel case. Black alligator strap. Silvered opaline dial. Octagonal crown set with a faceted spinel. Sword-shaped black oxidized steel hands. Self-winding automatic movement. Black Roman numerals. Sapphire crystal. Case diameter 38mm. Water resistant at 100 meters (330 feet). Cartier Santos 100 Steel Automatic XL Mens Watch W20073X8
Movement: automatic mechanical, exclusive Panerai OP III calibre, 13¼ lignes, 21 jewels. Côtes de Genève decoration on the bridges. PANERAI personalised oscillating weight. Glucydur® balance, 28,800 alternations/hour.
Incabloc® anti-shock device.
Power reserve 42 hours.
Chronometer Certificate (C.O.S.C.). Functions: hours, minutes, small seconds, date. Case: diameter 44 mm, steel; titanium. Bezel: steel; titanium. Back: screw, steel; titanium. Device protecting the crown: (protected as a Trade Mark) steel; titanium. Crystal: sapphire, formed of corundum, 3.5 mm thick, magnifying lens over the date at 3 o’clock. Anti-reflective coating. Water-resistance: 300 meters. Strap: alligator with PANERAI personalised buckle. Bracelet: links in brushed and polished steel (PAM00220), brushed titanium (PAM00279), each consisting of two overlapped parts or metal bracelet with vertical brushed finishing and polished surface between the links (PAM00299).
