Rolex Day-Date 40mm Sundust Dial 228235-0004

The Rolex Day-Date 40 reference m228235-0004 is a sophisticated embodiment of timeless prestige and subtle brilliance, a watch that has represented leadership and refinement since the Day-Date’s debut in 1956. Crafted entirely in Rolex’s patented 18 kt Everose gold—a rose gold alloy with platinum to maintain its warm hue forever—this 40mm model features a captivating sundust sunray dial set with 10 baguette-cut diamonds and the classic fluted bezel, where soft, shifting light meets elegant sparkle for understated opulence. Perfect for those who favor refined warmth, it offers the iconic instantaneous day and date displays with graceful harmony.

Aesthetic Excellence and Finishing Details

The m228235-0004 impresses with its 40mm Oyster case—monobloc middle case, screw-down case back, and winding crown—all cast in-house from 18 kt Everose gold for exceptional purity and a soft, enduring rose luster. The fluted bezel in matching Everose gold, a Rolex signature from functional origins, reflects light beautifully through its precise grooves.

The sundust dial showcases masterful sunray finishing: fine brushed grooves radiate outward from the center, creating delicate, ever-changing light reflections that give the dial its characteristic subtle glow. The sundust color—applied via Physical Vapour Deposition or electroplating and sealed with a light varnish—provides warm, nuanced depth. Elevated by 10 baguette-cut diamond hour markers for brilliant yet restrained sparkle and optimal legibility, it features Chromalight on the hands for discreet luminescence. The day window at 12 o’clock spells the day fully, the date at 3 o’clock is magnified by the Cyclops lens, and scratch-resistant sapphire crystal protects the dial.

The President bracelet—introduced in 1956 exclusively for the Day-Date—features semi-circular three-piece links in 18 kt Everose gold for supreme comfort and fluidity, secured by a concealed folding Crownclasp.

Technical Mastery and Reliability

The Calibre 3255, a next-generation perpetual self-winding mechanical movement fully designed and manufactured by Rolex, achieves Superlative Chronometer precision (-2/+2 seconds per day after casing). It incorporates:

• Paramagnetic blue Parachrom hairspring
• High-performance Paraflex shock absorbers
• Bidirectional Perpetual rotor

Functions include instantaneous day and date changes at midnight, secure rapid-setting, and stop-seconds. A 70-hour power reserve and Twinlock crown system deliver 100 metres (330 feet) water resistance.

Core Specifications

• Reference: Rolex Day-Date 40 (m228235-0004)
• Case Size: 40 mm
• Material: 18 kt Everose gold
• Bezel: Fluted, 18 kt Everose gold
• Dial: Sundust sunray, set with 10 baguette-cut diamonds
• Bracelet: President, semi-circular three-piece links in 18 kt Everose 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

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Essential Insights

1. What creates the sundust dial’s distinctive glow?

Sunray brushing with outward grooves diffuses light dynamically, with the sundust color applied precisely and varnished, accented by 10 baguette-cut diamonds for warm, subtle brilliance.

2. How does Everose gold enhance the model’s appeal?

Rolex’s patented alloy with platinum prevents fading, cast in-house for a soft rose tone that pairs perfectly with the sundust dial’s warmth.

3. Why is the President bracelet a hallmark of the Day-Date?

Designed exclusively in 1956, its semi-circular links in precious gold provide exceptional comfort and a concealed clasp for refined, seamless wear.

4. How does the Calibre 3255 perform under daily use?

The Parachrom hairspring and Paraflex absorbers resist magnetism, temperature, and shocks, while the extended power reserve ensures reliable, long-term accuracy.

5. What craftsmanship defines the sunray and diamond integration?

In-house brushing and color application meet precise gem-setting, creating a harmonious balance of light-reflecting sundust with baguette diamonds for enduring elegance.