Rolex Day-Date 40 (228348RBR)
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Basic information
- No.: m228398tbr-0001
- Brand: Rolex
- Series: Day-Date
- Movement type: Automatic
- Gender: Men
Movement
- Movement model: 3255
- Movement type: Automatic
- Manufacturer: Rolex
- Balance: Extra-large inertia fine-tuning balance
- Frequency: 28,800 oscillations per hour
- Grossspring: Paramagnetic blue Parachrom hairspring
- Shock absorber: High-performance Paraflex Shock absorber
- Number of jewels: 31
- Power reserve: 70 hours
- Technical certification: Superlative Chronometer certification
Appearance
- Diameter: 40 mm
- Case thickness: None
- Dial color: black
- Dial shape: round
- Strap color: gold
- Clasp type: concealed folding crown buckle
- Case bottom: None
- Weight: None
- Waterproof performance: 100 meters
- Hour marker type: diamond-set hour markers
Material
- Case material: 18k gold
- Dial material: 10 square-cut diamonds
- Bezel material: 18k gold, outer ring inlaid with diamonds
- Mirror material: scratch-resistant blue crystal
- Crown material: screw-in double buckle lock double waterproof system
- Strap material: 18k gold, President type, three-grid arched chain link
- Clasp material: 18k gold