Official Documents
Make the most out of your IWC watch to make it last longer. Here’s all the useful information for its maintenance.
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IWIW391023-Portofino Chronograph Edition “150 Years”
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IW391023 Specifications
Movement
Movement
- 79320 Calibre
- Automatic, self-winding
- 44 hours Power Reserve
- Frequency 28800.0 vph (4.0 hz)
- 240 Components
- 25 Jewels
- Côtes de Genève, perlage
Features
Features
- Chronograph function with hours, minutes and seconds
- Day and date display
- Sapphire glass, convex, antireflective coating on both sides
- Small hacking seconds
- Limited to 2000 pieces
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Care for your IWC Watch
Like any precision mechanical instrument, a watch from IWC Schaffhausen needs regular care and maintenance.
Learn more about your watch and how to maintain it.
Complete Service
It involves a full overhaul of the timepiece and is a complex, largely manual task that takes several hours.
HOW-TO TIPS
Learn how to clean your watch, wind it and more in our six-part “How To…” video series.
FAQS
If you can’t find answers to your questions here, please feel free to contact a member of our service staff.
