U1
U1 by Sinn is a robust tool for the wrist. Inside the 44 mm stainless steel case (submarine steel) runs the Sellita SW200-1 calibre (automatic, approx. 38 h power reserve). Sapphire glass and 1000 m water resistance put the watch into practical context; it is worn on a silicone strap for everyday wear and outdoors. Tool first, jewellery second.
All technical data comes from manufacturer information and is checked against manufacturer or retailer pages before inclusion. The editorial rating is our assessment of technology, build quality and value for money in the class, not a lab test. The guide price is based on the recommended retail price; you can always see the current price in the shop. More about how we work →
The specs of U1 in detail
Movement, case and features decide how a watch fares in everyday life. Here the key data of U1 are gathered clearly in one place, as in the manufacturer's data sheet.
Suits you if...
Our assessment based on technology, build quality, versatility and value for money in the respective class. We will show genuine user reviews as soon as they are available.
There are no user reviews for this model yet. You can find our editorial assessment on the left.
Frequently asked questions about U1
Here you will find short, clear answers about U1 by Sinn. The details help you judge size, movement, water resistance and price. That way you can decide faster whether the watch suits you.
How big is U1?
U1 measures 44 mm in diameter. That gives the watch a strong presence on the wrist; what matters is that the lugs do not extend beyond your wrist.
Which movement runs in U1?
U1 is powered by the Sellita SW200-1 calibre with automatic winding and around 38 hours of power reserve. It winds itself via the rotor while you wear it.
Is U1 water resistant?
U1 is pressure-tested to 1000 m and is therefore suitable for swimming and scuba diving. The metre rating is a test pressure and not a diving depth.
How much does U1 cost?
U1 (44 mm) has a guide price of approx. €2,500, based on the manufacturer's recommended retail price. This model is not currently listed at our partner shops; the guide price is for orientation.
What occasions is U1 suited to?
U1 suits everyday wear, the outdoors and sport best. This follows from its robust look, its size and its sapphire glass and silicone strap.
Which watches are similar to U1?
Kamasu by Orient, Prospex Turtle SRPE93 by Seiko and Mako II by Orient go in a similar direction. They share the watch type or a related concept and are worth comparing before you buy.
Related guides
More orientation around U1: these guides go deeper into watch type, technology and buying decisions and help you compare it with other models.