IW659601
Portofino Automatic Moon Phase 37
Automatic winding, Diameter 37.1 mm
PRODUCT INFORMATION
- Silver dial
- Blue calfskin strap with quick-change system Strap width 18.0 mm
DELIVERY & RETURNS INFORMATION
Currently not available for delivery
CONNECT TO A WATCH EXPERT
Contact Concierge
Our concierge service is available during the following hours
Monday to Saturday: 10:00am – 7:00pm local time
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 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
- Hours power reserve 120 Hours power reserve
- Frequency 28'800 VPH (4 Hz)
- Components 187 Components
- Jewels 21 Jewels
- Finishing Côtes de Genève
__ref__
__title__
__price__
