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Rolex Day-Date 40 mm

Rolex Day-Date 40 mm

AutomaticPlatinum

Ref. 228396TBR-0031

Collection: Day-DateCase size: 40mmMovement: 3255

The Rolex Day-Date 40, reference 228396TBR-0031, is a platinum watch measuring 40 mm across. The case stands 12 mm thick and is fitted with a diamond-set bezel, a detail that sets this piece apart within the collection. A Cyclops lens sits over the date on the scratch-resistant sapphire crystal, magnifying it for easy reading. Inside is the calibre 3255, a self-winding movement with a 70-hour power reserve and Rolex's chronometer certification. The slate dial shows day and date alongside luminous hands and indices, and the watch is set with diamonds on the bezel. It rides on a platinum President bracelet fitted with a concealed folding Crownclasp. The screw-down winding crown, part of the Twinlock system, helps keep the case waterproof to 100 metres.

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Last updated 4 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

GENERAL

Gender

Men

CASE

Diameter

40mm

Thickness

12mm

Case Material

Platinum

Water Resistance

100m

Crystal

Sapphire Crystal

Bezel Material

Gem-set

MOVEMENT

Movement Type

Automatic

Caliber

3255

Power Reserve

72h

Frequency

28,800 vph (4 Hz)

Jewels

31 jewels

DIAL

Dial Color

Grey

Numerals

Lines

BRACELET/STRAP

Bracelet/Strap

Platinum

Clasp Type

Hidden Fold Clasp

Clasp Material

Platinum

FEATURES & COMPLICATIONS

Central secondsChronometerDateGemstones and/or diamondsLuminous handsLuminous indicesQuick SetScrew-Down CrownWeekday

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