CHF 45,800.00
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The first watch added to our new Ex-Demonstration collection is the OG from the Spacetime family. The UR-100 IRON. In a raw format in a stainless steel and titanium case almost devoid of all colour except the hint of red on the minute pointer and the 60th minute.

What Is Ex-Demo?

Quite simply it is special pieces that have been worn by the creators of URWERK and the team during the watch expo’s/launch events around the world to present to our collectors, retailers and the international media. Some have even been the watch you see in our adverts or on our website and social channels. Now for the first time like in the car industry, we are making these pieces available to our customers. These are backed by a brand new warranty of two years – extendable to four if registered on our member's lodge. They may carry signs of wear, or as we like to call them battle scars;) but the watches have been tested and are in perfect working order, and come with a brand new strap. 

The UR-100 Spacetime

Making a big impact when landing on Terra Firma in 2019. A smaller highly wearable design taking queues from our original UR-101 and UR-102 from over 20 years ago! With a case size of 41.0mm wide by 49.7mm long. With a shallow depth of only 14mm thanks to the newly designed orbital hour satellites.


Using the URWERK calibre 12.01 which required high precision because of extremely tight tolerances between the minute hand and the three different dials and the domed sapphire crystal. 
The UR-100 is also the first watch by URWERK to show in full its winding rotor through the sapphire case back. But this is no ordinary rotor! The UR-100’s automatic winding rotor is regulated by a flat turbine, the Windfäng (Swiss German for “air trap”) that minimizes shocks to the rotor bearing and reduces over-winding and wear and tear. The rotor, which is partially supported on its periphery by the flat turbine, also has a larger diameter, resulting in a lower mass and therefore less wear.

Three Dimensional Time 

The UR-100’s brings new astronomical indications to URWERK. With your feet firmly on planet Earth, we also take you into the realms of Spacetime! Rather than the red-arrow-tipped minute pointers on the hour satellites disappearing after 60 minutes when replaced by the next, the UR-100 minute arrow passes beneath and between subsidiary dials, reappearing to display: distance travelled on Earth and distance travelled by Earth.

Distance travelled on Earth

The first indicator at 10 o’clock evaluates the distance in kilometres that we have travelled on the Earth without even leaving our desks! It is based on the average speed of the rotation of the Earth on its axis at the equator, covering a distance of 555 km every 20 minutes.

Distance travelled by the Earth around the sun

Directly opposite at 2 o’clock, the same hand (well it looks like the same hand, but is actually one of three) continues its journey to another celestial indication featuring the distance the Earth has travelled in its orbit around the sun – a journey spanning some 35,740 km every 20 minutes.

The UR-100 simultaneously presents three different space-time realities, providing a thought-provoking reminder of our voyage through time and space.

Creators Thoughts:

Martin Frei “For me, watches have a philosophical dimension. They are a physical and abstract reproduction of our situation on Earth, with the dial representing the equator, simultaneously in constant motion while seemingly stationary for us,”

Felix Baumgartner - “We live in a universe governed by three dimensions — time, rotation, and orbit — that we attempt to measure and master, but what escapes us is this notion of spacetime.”

Now you can enjoy the original UR-100 IRON directly from us with this ex-demo piece and start your URWERK journey. 

Why buy from us?

Any URWERK bought from our official Pre-Owned collection is covered with our Pre-Owned two-year international warranty, for your peace of mind.

Our Certified Pre-Owned watches are refurbished, serviced and tested by our own watchmakers. Ensuring the URWERK quality is upheld. Enabling you to purchase a pre-loved URWERK in exceptional condition as close to as good as new as you fill find.

Please be aware that due to the protection of endangered species our watches cannot be shipped on Alligator leather straps. As this can result in major delays in you receiving your new purchase.

Leather straps can be purchased separately.

We have you covered; as a thank you for selecting the URWERK SHOP, we ship anywhere in the world free of charge. Full tracked and traced.

Nice and Simple. But remember we don't cover local import taxes and duties outside of Switzerland. These are the responsibility of the client. So please before making a purchase check with your local authorities regarding any possible fees. 

Delivery Options

Watches will be shipped using the best courier service based on your location. Please note, deliveries are not made on Bank Holidays or Sundays. Please allow additional time, if ordering on or near public holidays or weekends. Delivery will commence once payment is secured depending on payment type.

Important Information

Please check that the shipping address is correct as we are unable to redirect orders once they're in transit, and we are unable to deliver to PO box numbers.

Before we can despatch your purchase, we may need to confirm your details with your card issuer. Please ensure that your billing address matches that kept on record with your card issuer. We will do our best to minimise any delay. Occasionally we may need to contact you to confirm additional security details before shipping your order.


Your purchase is insured whilst in transit until it is delivered to you. We require a signature for any goods delivered, at which point responsibility for your purchased goods passes to you. If you do not receive the goods in person (i.e. for gift orders or where an item has been signed for by a concierge/reception desk) then the person who signs for the package confirms receipt and is accountable for the package.

In the rare event that you’re not totally in love with your URWERK purchase, please contact us by calling +41 22 900 20 25