IWC Portofino Automatic Moon Phase 37 Year of the Snake

Red dial
Black calfskin strap with quick-change system Strap width 18.0 mm
Portofino Automatic Moon Phase 37 Year of the Snake
Following a time-honored tradition, IWC Schaffhausen welcomes the Lunar New Year with a special edition. The Portofino Automatic Moon Phase 37 Year of the Snake features a stainless steel case with a diameter of 37 millimeters and a burgundy dial. This unique shade of red symbolizes the vibrant color of fire, typically used to welcome the Lunar New Year in China. Situated at 12 o’clock, the moon phase display works so precisely that it only deviates from the actual orbit of Earth’s satellite by one day after 122 years. The golden moon and stars stand out against the burgundy backdrop and harmonize beautifully with the gold-plated hands and appliques. The watch is powered by the IWC-manufactured 32800 caliber with automatic winding and a power reserve of five days. A special highlight is hidden on the back: the gold-plated oscillating mass is crafted in the shape of a snake, a nod to the Lunar New Year. For added versatility, the Portofino Automatic Moon Phase 37 comes with two straps. One is crafted from black calfskin and one from burgundy calfskin, while both feature a butterfly clasp. A quick change system enables wearers to change the look of their watch effortlessly.
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 ?C one lunation ?C 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.
Central hacking seconds
Moon phase display
IWC bracelet quick-change system
Sapphire glass, convex, antireflective coating on both sides
Limited to 500 pieces
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
IWC 32800 Calibre
Movement type
Automatic winding
Power Reserve Indicator
120 hours
Frequency
28’800 VPH (4 Hz)
Components
187
Jewels
21