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The Portofino Automatic Moon Phase 37 features the IWC-manufactured 32800 caliber and a see-through sapphire glass back displaying the movement.
ABOUT THE WATCH
Portofino Automatic Moon Phase 37
With its reduced case diameter of 37 millimetres, the Portofino Automatic 37 has become a staple in IWC’s women’s watches portfolio, offering excellent wearing comfort on more slender wrists. The Portofino Automatic Moon Phase 37 features a case made of 18-carat 5N gold, a silver-plated dial, and gold-plated hands and appliqués. The case and the dial are decorated with 72 diamonds weighing 1.12 carats. Because of an improved setting, the diamonds reflect the light better and have a more visible presence and added brilliance. For the IWC-manufactured 32800 calibre, IWC has integrated a moon phase module into a movement from the 32000 caliber family for the first time. The moon phase display at 12 o’clock works so precisely that it only deviated from the actual orbit of Earth’s satellite by one day after 122 years. A see-through sapphire glass back displays the movement, which has been finished with a gold-plated rotor and blued screws. This ladies’ watch is fitted with a taupe strap made of fully traceable Swiss calf leather. The strap has a natural and soft finish and boasts a contemporary, luxurious feel. Thanks to the integrated quick-change system, the strap can be exchanged easily.
Moon phase display | IWC Schaffhausen
The difficulty in displaying the moon phase on the dial of a watch comes from the fact that the moon does not follow a daily rhythm in its orbit around the Earth. A cycle from new moon to new moon – one lunation – does not last 30 days, but exactly 29 days, 12 hours, 44 minutes, and 2.88 seconds. Therefore, a period of 30 days must be slowed down to come as close as possible to one lunar cycle. This is achieved by placing a reduction gear between the day star and the moon phase disc. The key to high precision lies in the number of wheels used, their proportions and the number of teeth they have. IWC’s moon phase displays are calculated to the highest precision and accuracy.
Features
Case
Movement
Packaging
Central hacking seconds
IWC bracelet quick-change system
Sapphire glass, convex, antireflective coating on both sides
Moon phase display
Case
18 ct 5N gold
Case
Diameter
37.1
mm
Height
11.3
mm
Back case
See-through sapphire glass back
Water resistance
5.0
bar
Calibre
32800
Calibre
Movement type
Automatic winding,
IWC-manufactured movement
