Rolex Oyster Perpetual Lady-Datejust 28 (m279171-0011)

Specifications and Details

General Information

• Model Name: Rolex Oyster Perpetual Lady-Datejust 28
• Reference Number: m279171-0011
• Collection: Oyster Perpetual
• Launch Year: Part of the Lady-Datejust line, introduced in 1957, with this specific configuration being a modern iteration.

Case

• Material: Everose Rolesor (combination of Oystersteel and 18k Everose gold)
  • Oystersteel: A high-grade stainless steel alloy known for its durability and corrosion resistance.
  • Everose Gold: Rolex’s proprietary 18k pink gold alloy, offering a warm, luxurious hue.
• Diameter: 28 mm
• Case Design: Oyster, flat three-piece links
  • The Oyster case is renowned for its waterproofness and robustness, featuring a monobloc middle case, screw-down case back, and screw-down crown.
• Bezel: Fluted, crafted in 18k Everose gold
  • Originally designed to screw the bezel onto the case for waterproofness, the fluted bezel is now a signature aesthetic feature of Rolex, adding elegance and distinction.
• Crystal: Scratch-resistant sapphire with Cyclops lens over the date
  • The Cyclops lens magnifies the date by 2.5x for enhanced readability.
• Water Resistance: Up to 100 meters (330 feet)
  • Ensured by the Twinlock double waterproofness system in the screw-down crown.

Dial

• Color: Chocolate, diamond-set
  • Features a rich chocolate dial with diamond hour markers, enhancing its luxurious appeal.
• Finish: Sunray
  • The sunray finish is created using masterful brushing techniques, producing grooves that radiate from the center of the dial. This creates delicate light reflections that shift with wrist movement, giving a subtle, dynamic glow.
• Hour Markers: Diamond markers
  • Nine diamonds set as hour markers, crafted to prevent tarnishing and ensure lasting brilliance.
• Hands: Luminescent hour, minute, and seconds hands
  • Center hour, minute, and seconds hands for precise timekeeping.
• Date: Located at 3 o’clock with instantaneous date change and rapid setting
  • The date window is magnified by the Cyclops lens for easy reading.

Movement

• Caliber: Perpetual, mechanical, self-winding, Rolex Calibre 2236
  • A high-precision movement developed and manufactured in-house by Rolex.
• Functions:
  • Center hour, minute, and seconds hands.
  • Instantaneous date with rapid setting.
  • Stop-seconds feature for precise time setting, allowing the seconds hand to stop when the crown is pulled out.
• Precision: -2/+2 seconds per day, after casing
  • Certified as a Superlative Chronometer, surpassing COSC (Swiss Official Chronometer Testing Institute) standards.
• Power Reserve: Approximately 55 hours
• Oscillator: Syloxi hairspring in silicon with patented geometry
  • Offers greater resistance to magnetic fields and temperature variations.
• Shock Absorbers: High-performance Paraflex shock absorbers
  • Enhances resistance to shocks and impacts, ensuring reliability.
• Winding: Bidirectional self-winding via Perpetual rotor.

Bracelet

• Type: Jubilee, five-piece link metal bracelet
  • Designed specifically for the launch of the Oyster Perpetual Datejust in 1945, the Jubilee bracelet is known for its supple and comfortable fit.
• Material: Everose Rolesor (combination of Oystersteel and 18k Everose gold)
• Clasp: Oysterclasp with Easylink 5 mm comfort extension link
  • The Easylink system allows for quick adjustment of the bracelet length for added comfort.