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Rolex Day-Date 40 mm

Rolex Day-Date 40 mm

AutomaticYellow Gold

Ref. 228348RBR-0034

Collection: Day-DateCase size: 40mmMovement: 3255

Rolex Day-Date 40, reference 228348RBR-0034, cases the movement in 18 ct yellow gold at 40 mm across and 12 mm thick. The bezel is diamond-set, matched to a white dial under a scratch-resistant sapphire crystal with Cyclops lens over the date. Inside runs the calibre 3255, a self-winding Manufacture movement certified as a chronometer, with day and date shown in apertures alongside central seconds. As with all Day-Date models, this one is set with diamonds, here on the bezel rather than the dial or lugs. The screw-down crown uses Rolex's Twinlock double waterproofness system. The gold President bracelet, with its semi-circular three-piece links, closes with a concealed folding Crownclasp. Waterproofness reaches 100 metres, the standard depth rating for this reference.

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Last updated 4 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

GENERAL

Gender

Men

CASE

Diameter

40mm

Thickness

12mm

Case Material

Yellow Gold

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

White

Numerals

Roman Numerals

BRACELET/STRAP

Bracelet/Strap

Yellow Gold

Clasp Type

Hidden Fold Clasp

Clasp Material

Yellow Gold

FEATURES & COMPLICATIONS

Central secondsChronometerDateGemstones and/or diamondsQuick SetScrew-Down CrownWeekday

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