Rolex 278240-0012 Datejust 31mm Stainless Steel Jubilee Mint Green Dial Watch

Rolex Datejust 31 – Ref. 278240-0012

The Rolex Datejust 31 Ref. 278240-0012 epitomizes elegant minimalism and precision in a compact wristwatch package. With a 31 mm Oystersteel case, mint green sunray dial, Jubilee bracelet, and Rolex’s in-house Calibre 2236, this model combines daily wear resilience with refined aesthetic flair. Perfect for those seeking a smaller, versatile Rolex with character.

Case & Material

This model features the Oystersteel (Rolex’s 904L stainless steel) construction for the 31 mm case, delivering excellent corrosion resistance and polished appearance. The case is built with the classic Oyster architecture—monobloc middle case, screw-down case back, and screw-down Twinlock crown—ensuring water resistance up to 100 meters / 330 feet. Rolex’s craftsmanship ensures robust protection while maintaining elegance.

Mint Green Sunray Dial

Under the scratch-resistant sapphire crystal (with the signature Cyclops magnifier over the date), you’ll find a mint green sunray dial. The sunray finishing is achieved by finely brushing concentric grooves from the center outward, creating dynamic light plays as the wrist moves. The mint green tone is fresh and distinctive—less common than standard dial colors—giving personality without overwhelming. Baton-style hour markers and luminescent hands complete the look, offering clean readability and tasteful contrast.

Movement & Performance — Calibre 2236

Powering this reference is the Rolex Calibre 2236, a self-winding mechanical movement equipped with a Syloxi silicon hairspring and Paraflex shock absorbers. After being cased, the watch is certified as a Superlative Chronometer, offering precision of –2/+2 seconds per day. The movement delivers an estimated 55 hours of power reserve, making it practical for everyday use without frequent winding.

Bracelet & Comfort

The 278240-0012 is paired with Rolex’s distinguished Jubilee bracelet, consisting of five-piece links that offer flexibility, comfort, and elegance on the wrist. It uses the concealed folding Crownclasp, which preserves seamless lines and a refined aesthetic. The bracelet is designed to wear comfortably over long durations while retaining a luxurious feel.

Technical Specifications at a Glance

• Reference: 278240-0012
• Case Material: Oystersteel
• Case Size: 31 mm
• Bezel: Domed (smooth bezel)
• Dial: Mint green sunray, baton indices, date window
• Movement: Calibre 2236, automatic, date
• Power Reserve: ~55 hours
• Water Resistance: 100 m / 330 ft
• Bracelet: Jubilee, concealed Crownclasp
• Certification: Rolex Superlative Chronometer

Unique Characteristics & Appeal 278240-0012

• Mint green dial rarity: The mint green dial is a standout in the Datejust line—fresh, subtle, and less seen, giving collectors and wearers a unique color signature.
• Compact yet fully featured: Though small in diameter, it retains all essential Rolex features—robust movement, water resistance, refined finishing.
• Elegant blend: With the smooth bezel (versus fluted) and Jubilee bracelet, this reference leans towards a refined, dressy profile rather than sporty.
• Reliability from Rolex engineering: The Calibre 2236 brings modern enhancements with Syloxi, ensuring both precision and durability in everyday use.

Conclusion

The Rolex Datejust 31 Ref. 278240-0012 is a refined choice for those who seek understated luxury in a smaller format. With its mint green dial, Oystersteel robustness, Jubilee bracelet comfort, and dependable movement, it delivers a balanced combination of personality and performance. This reference is ideal for anyone desiring a Rolex that’s elegant, versatile, and distinct.