Rolex Day-Date 40 228398tbr-0039 40mm

The Rolex Day-Date 40 reference m228398tbr-0039 stands as a striking embodiment of confidence and luxury, continuing the legendary status of the Rolex Day Date line since its groundbreaking introduction in 1956. Fully executed in luminous 18 ct yellow gold, this 40mm watch showcases a vivid green lacquered dial complemented by a diamond-set bezel, merging intense colour with dazzling light for a contemporary take on classic prestige. Perfect for individuals who favour expressive elegance, it retains the signature instantaneous day and date functions in a design that commands attention.

Visual Design and Materials

This reference gleams with its 40mm Oyster case structure—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 alloy purity and a rich, enduring finish. The bezel is transformed into a sparkling jewel border, with diamonds meticulously hand-set for exact alignment, orientation, and brilliant light play.

The standout green lacquered dial results from Rolex’s precise lacquering process: six carefully applied layers on a brass foundation in a contamination-free environment, followed by colourless varnish and hand-polishing for exceptional depth and glossy intensity. Clean appliques and pad-printed details maintain sharp legibility. The full day spelling appears at 12 o’clock, the date at 3 o’clock benefits from the Cyclops magnification lens, and subtle Chromalight provides low-light readability. Scratch-resistant sapphire crystal completes the protection.

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

Mechanical Excellence

Beneath the surface, 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

It enables instantaneous day and date shifts at midnight, secure rapid-setting of functions, and stop-seconds for precise time adjustment. A 70-hour power reserve and Twinlock crown system provide 100 metres (330 feet) water resistance.

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Key Specifications

• Reference: Rolex Day-Date 40 (m228398tbr-0039)
• Case Size: 40 mm
• Material: 18 ct yellow gold
• Bezel: Diamond-set, 18 ct yellow gold
• Dial: Green lacquered with appliques
• 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. How does Rolex achieve such vivid green on the dial?

Multiple lacquer layers are applied under strict conditions, then varnished and polished by hand to create intense, uniform colour with remarkable depth.

2. What level of precision goes into the diamond bezel?

Each diamond seat is hand-crafted in the gold, with gems individually selected and set for perfect height, alignment, and maximum brilliance.

3. Why is the President bracelet exclusive to the Day-Date?

Designed specifically in 1956, its semi-circular links in precious metal offer unmatched fluidity, comfort, and a hidden clasp for elegant continuity.

4. How reliable is the Calibre 3255 in real-world use?

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

5. What makes this combination of green dial and diamonds unique?

In-house lacquering expertise meets master gem-setting, producing a bold yet harmonious design that highlights Rolex’s freedom in colour and jewellery craftsmanship.