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Rolex Datejust 31 mm

Rolex Datejust 31 mm

AutomaticGold/Steel

Ref. 278344RBR-0020

Collection: DatejustCase size: 31mmMovement: 2236

Rolex Datejust 31 mm, reference 278344RBR-0020, cased in steel and gold. The case measures 31 mm across and carries a domed, diamond-set bezel. A Cyclops lens sits over the date on the scratch-resistant sapphire crystal. Inside is the self-winding calibre 2236, a chronometer movement with a 55-hour power reserve. The mint green dial shows luminous hands and indices along with a central seconds display and date. Diamonds are set into the case, and the watch rides on a steel bracelet fitted with a concealed folding Crownclasp. The clasp helps secure the case to its 100 metre water resistance rating.

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Last updated 4 Oct 2026Suggest a correction

TECHNICAL SPECIFICATIONS

GENERAL

Gender

Unisex

CASE

Diameter

31mm

Case Material

Gold/Steel

Water Resistance

100m

Crystal

Sapphire Crystal

Bezel Material

Gem-set

MOVEMENT

Movement Type

Automatic

Caliber

2236

Power Reserve

55h

Frequency

28,800 vph (4 Hz)

Jewels

55 jewels

DIAL

Dial Color

Green

Numerals

Lines

BRACELET/STRAP

Bracelet/Strap

Steel

Clasp Type

Hidden Fold Clasp

Clasp Material

Gold/Steel

FEATURES & COMPLICATIONS

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

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