IW459401
Portofino Automatic Moon Phase
Automatic winding, Diameter 40.0 mm
PRODUCT INFORMATION
- Silver dial
- Dark brown alligator leather strap
- Strap width 20.0 mm
DELIVERY & RETURNS INFORMATION
The delivery options available in individual cases depend on the delivery address. We will inform you of the expected delivery time after you have entered your address in the checkout. Free delivery and return
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Contact Concierge
Our concierge service is available during the following hours
Monday to Friday: 9:00am – 7:00pm
Saturday: 9:00am – 5:00pm
Portofino Automatic Moon Phase
The Portofino Automatic Moon Phase is the first Portofino timepiece with a case diameter of 40 millimetres that features a moon phase display.
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
- Case Stainless steel
- Diameter 40.0 mm
- Height 11.1 mm
- Water resistance 3.0 bar
- Calibre 35800
- Movement type Automatic winding
- Power Reserve 50 hours
- Frequency 28'800 VPH (4 Hz)
- Jewels 25
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