IWC Portugieser Yacht Club Moon & Tide

Black dial
Stainless steel bracelet
Strap width 22.0 mm
Portugieser Yacht Club Moon & Tide
The first Portugieser, Reference 325 from 1939, was inspired by IWC Schaffhausen’s deck observation watches-nautical instruments used to perform navigational tasks on ships. This heritage is reflected by the Portugieser Yacht Club, which has brought a hint of sportiness to the collection since 2010. The Portugieser Yacht Club Moon & Tide is the first stainless steel model to feature the IWC-developed tide indication. Located at 6 o’clock on the dial, it informs about the expected times for the next high and low tide. Another feature is the Double Moon indication at 12 o’clock, which shows the moon phase as seen from the Northern and Southern hemispheres and will only deviate by one day after 125 years. The display has been enhanced to show spring and neap tides, indicating the strength of the current tides. The black dial is made in an intricate process comprising 60 individual steps. Thanks to the application of 15 layers of transparent lacquer, it emanates tremendous visual depth. The watch features a polished stainless steel case with a diameter of 44.6 millimetres and rhodium-plated hands and appliques. The transparent sapphire glass case back showcases the IWC-manufactured 82836 caliber with a Pellaton automatic winding system and ceramic components. This nautical sport watch is fitted with a stainless steel bracelet with brushed H-links and polished center links.
Double Moon | IWC Schaffhausen
The double moon display shows the current moon phase for the northern and southern hemispheres simultaneously. In each lunar month, the moon’s orbit as displayed on the watch deviates by about 12 seconds. Thanks to its ingenious design, the double moon only needs to be adjusted by 1 day every 577 years.
Tide Indication | IWC Schaffhausen
The tides are a timelessly fascinating spectacle: twice a day, the waves retreat from the shore before inexorably rising again. This natural phenomenon is caused by a complex interplay between the gravitational and centrifugal forces of the moon, the earth and the sun. The time between two high tides is precisely 12 hours and 24 minutes. If, for example, it is high tide at midnight, the next high tide will occur at 12.24. The Portugieser Yacht Club Moon & Tide shows the slightly shifting time for the next high tide on the dial. During the 12 hours and 24 minutes between two high tides, the display disc will rotate by around 24 minutes on its 12-hour scale. The energy required is channelled from the base movement’s hour pinion. A precisely calculated reducing gear comprising three cogs slows the rotation to the point where the tidal disc rotates around its axis once in exactly 14.76 days. The tidal display module is integrated into the 82835 calibre movement and contains 49 parts.
Central hacking seconds
Pellaton automatic winding
Sapphire glass, convex, antireflective coating on both sides
Date display
Tide indication, double moon phase for the northern and southern hemisphere with integrated display of neap and spring tide
Silicon hairspring for increased protection against magnetic fields
Case
Stainless steel case
Diameter
44.6 mm
Height
13.4 mm
Back case
See-through sapphire glass back
Water resistance
10.0 bar
Calibre
IWC 82836 Calibre
Movement type
Automatic winding, IWC-manufactured movement
Power Reserve Indicator
60 hours
Frequency
28’800 VPH (4 Hz)
Components
228
Jewels
25