Patek Philippe brand

Cal.28-20/220 movement model

29.6 x 51.7 mm dial diameter

18k gold watch case material

Basic Information: Model Number 5100J; Brand: Patek Philippe; Gender: Men; Movement: Cal. 28-20/220; Manufacturer: Patek Philippe; Technical Certifications: Swiss Observatory Certification, Geneva Seal; Appearance: Case Diameter: 29.6 x 51.7 mm; Case Thickness: 12.2 mm; Dial Color: White; Dial Shape: Square; Strap Color: Black; Buckle Type: Pin Buckle; Case Back: Transparent; Weight: Not available; Water Resistance: 30 meters (Patek Philippe implemented a new water resistance standard in 2024; this rating indicates the depth to which the watch can be submerged). Hour Marker Type: Tapered Hour Markers, Arabic Numerals; Buckle Spacing: Not available; Lug Spacing: Not available; Materials: Case Material: 18k Gold; Dial Material: Not available; Bezel Material: 18k Gold; Crystal Material: Sapphire Crystal; Crown Material: 18k Gold; Strap Material: Leather; Buckle Material: 18k Gold; Functions: Power Reserve Display, Long Power Reserve.