Rolex Day-Date 40 228398tbr-0041 40mm

The Rolex Day-Date 40 reference m228398tbr-0041 embodies profound luxury and masterful execution, continuing the Day-Date’s iconic legacy of prestige since 1956. Fully crafted in radiant 18 ct yellow gold, this 40mm watch features a dramatic bright black sunray dial set with 10 baguette-cut diamonds and a diamond-paved bezel, where intense darkness meets explosive sparkle for captivating contrast. Suited for those who desire bold, sophisticated opulence, it maintains the signature instantaneous day and date functions in a design of striking depth.

Visual Design and Materials

This reference dazzles with its 40mm Oyster case—a monobloc middle case, screw-down case back, and winding crown—all produced in Rolex’s dedicated 18 ct yellow gold foundry to ensure superior purity and a rich, enduring luster. The bezel is elevated to jewel status, paved with diamonds meticulously hand-set for exact alignment, orientation, and brilliant light performance.

The bright black dial highlights Rolex’s sunray finishing: masterful brushing creates grooves running outwards from the centre, diffusing light for a characteristic subtle glow that shifts with wrist position. The intense black is applied using Physical Vapour Deposition or electroplating, followed by a light varnish coat. Elevated by 10 baguette-cut diamond hour markers for refined sparkle and legibility, it features highly legible Chromalight with long-lasting blue luminescence. The day spells out fully at 12 o’clock, the date at 3 o’clock benefits from the Cyclops lens, and scratch-resistant sapphire crystal safeguards the surface.

Paired with the President bracelet—created in 1956 solely for the Rolex Day Date—the watch comprises semi-circular three-piece links in 18 ct yellow gold for outstanding comfort and seamless drape, fastened by a concealed Crownclasp.

Mechanical Excellence

Beneath the opulent exterior, the Calibre 3255—a fully in-house developed and manufactured perpetual self-winding movement—delivers Superlative Chronometer performance (-2/+2 seconds per day after casing). Key technologies include:

• Blue Parachrom hairspring (paramagnetic)
• Paraflex shock absorbers
• Bidirectional Perpetual rotor for efficient winding

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Key Specifications

• Reference: Rolex Day-Date 40 (m228398tbr-0041)
• Case Size: 40 mm
• Material: 18 ct yellow gold
• Bezel: Diamond-set, 18 ct yellow gold
• Dial: Bright black sunray, set with 10 baguette-cut diamonds
• Bracelet: President, semi-circular three-piece links in 18 ct yellow gold
• Movement: Calibre 3255, Manufacture Rolex, self-winding
• Complications: Hours, minutes, seconds; instantaneous day and date with rapid-setting
• Power Reserve: Approximately 70 hours
• Water Resistance: 100 metres / 330 feet
• Crystal: Scratch-resistant sapphire with Cyclops lens over the date

Common Questions Answered

1. What creates the bright black dial’s dynamic allure?

Sunray brushing with outward grooves produces subtle, moving light reflections, enhanced by varnish and 10 baguette-cut diamonds for depth and contrast.

2. How is the diamond-set bezel perfected?

Each diamond seat is hand-crafted in the gold, with gems selected and set for precise height, alignment, and maximum brilliance in a seamless ring.

3. Why is the President bracelet exclusive to this collection?

Designed in 1956 for the Day-Date, its semi-circular links in precious gold offer unmatched fluidity, comfort, and a hidden clasp for elegant continuity.

4. How reliable is the Calibre 3255 in demanding settings?

The Parachrom hairspring and Paraflex absorbers protect against magnetism, temperature fluctuations, and shocks, ensuring long-term precision.

5. What makes the black sunray and diamond combination special?

In-house finishing and gem-setting create flawless harmony, blending intense black depth with baguette diamonds and bezel sparkle for a bold, factory-original masterpiece.