Day-Date II Platinum Black Arabic

In Context

At 41 mm it is sized to the current mainstream: 40 mm is the median across every watch measured in this catalogue. The case back is closed, so the movement stays out of sight, and the sapphire crystal will resist everything short of deliberate abuse. 100 m is genuine swimming resistance — more than the shape of this watch suggests it would need.

The movement winds itself from the motion of your wrist. 48 hours of reserve is enough to set it down on Friday evening and find it still running on Monday. At 28,800 vph the seconds hand advances 8 times a second.

218206-0003 is one of 7 executions of the 218206 base reference. Underneath they are the same watch; what separates this one is a black dial and a platinum case. Beyond the time it carries a day-date.

The 3156 is the Day-Date II movement of 2008 to 2015. It is the 3155's day-and-date mechanism with a Parachrom hairspring and, for the first time in a Rolex, Paraflex shock absorbers. It powers 17 watches in this library, every one a 41 mm Day-Date II. It has 31 jewels, a 48-hour reserve and a beat of 28,800 vph at 28.5 mm across, with the day and date both quick-set, and every one is a COSC chronometer. Paraflex, Rolex's own shock absorber, debuted here and spread to the rest of the range. In the library it powers all 17 [Day-Date II](/brands/rolex/day-date-ii) references, in white gold, platinum, yellow gold and Everose. The Day-Date 40 of 2015, on the [3255](/calibers/rolex-3255), replaced the watch and the movement together. The [3155](/calibers/rolex-3155) is the 36 mm Day-Date's version of the same movement, and the [3136](/calibers/rolex-3136) its Datejust II counterpart with a date alone.

16 other watches in the library run the Rolex 3156.

Rolex

Day-Date II Platinum Silver Diamonds

218206-0009 · 41 mm

Rolex

Day-Date II Platinum White Roman

218206-0053 · 41 mm

Rolex

Day-Date II Everose Ivory Roman

218235-0033 · 41 mm

Rolex

Day-Date II Platinum Ice Blue Arabic

218206-0010 · 41 mm