Urwerk 103 T – the Tarantula

On my first day of Baselworld i visited The Watch factory where a lot of independent watch brands where gathered. Among them Urwerk with of course their much talked about Tarantula! Luckily the charming Yacine Sar from Urwerk also brought some other watches like the 103 TiAlN on her own wrist :D

Urwerk 103 TiAlN

URWERK 103 TiAlN

The URWERK 103T Tarantula is newest from this innovative watchbrand. Master watchmaker Felix Baumgartner and visionary chief designer Martin Frei are the creative minds behind URWERK.

The 103T looks more or less the same as the ‘normal’ 103, but what’s normal about this watch in the first place? The huge difference is a new crystal that gives you full view on the watch’s time display mechanism. Since this crawles across the ‘dial’ this version of the 103 is also called the Tarantula.

Calibre 3.03 manual winding movement

103T orbital satellite

When taking a closer look you will see the 103T is actually very different from the classic 103. In the classic UR103, the central element is an orbital cross in titanium. In the new UR103T, the titanium cross has been replaced by a completely redesigned structure in ARCAP. The dark ARCAP is a very stable copper/nickel alloy, that is light, non magnetic and corrosion resistant.

The four satellites of the UR103T are made of aluminum and mounted on their own bronze/beryllium Geneva cross. The mechanism is then suspended from the orbital cross structure in ARCAP and is mounted on an ARCAP plate.

This new configuration ensures that the numbers on the hour satellites can only be seen when they are required to tell the time while passing the arc of the minutes. In this the new URWERK 103T is also different from the classic 103 with the open satellite system.

The orbital satellite complication of the 103T is over 300 times heavier than traditional hands which is a factor that requires absolute precision in the manufacture of its minuscule components and in assembling, balancing and regulating the complication to obtain the excellent chronometric performance URWERK demands of its exceptional timepieces.

Here’s the new URWERK 103T Tarantula, beautiful isn’t it?

URWERK 103T - Tarantula

URWERK 103T - Tarantula

The case is made of stainless steel treated with AlTiN (Aluminium, Titanium, Nitride) and is 36mm wide, 13,5mm thick and measures 50mm from lug to lug. The hour satellites complete a full revolution under the orbital cross every four hours. Over a one-year time span each orbital cross completes 2190 rotations and each satellite 730 revolutions on its own axis.

At the caseback the URWERK 103T has even more to show. Here’s the control board that features a 43-hour power reserve indicator, a chrono meter with minutes and seconds facilitating accurate time-setting and a precision adjustment screw making it possible for the owner to precisely regulate the timing.

On my wrist is my favorite Tarantula… a black 103T Tarantula :)

URWERK 103T Tarantula

URWERK 103T Tarantula

For more information about URWERK check their website or the URWERK forum at Horomundi.

Frank Geelen

Frank Geelen is an expert on Haute Horlogerie and his horological heart beats faster from beautiful hand-finished mechanical movements. He loves to explain all technical details of complications like tourbillons, minute repeaters, constant force escapements and column-wheel chronographs and he has been doing that for more than seven years. Besides publishing daily here at Monochrome Watches, Frank also writes for several other publications, both online and offline.

View all articles by Frank Geelen

4 Responses to “Urwerk 103 T – the Tarantula”

  1. Geo says:

    For me the mystery of the 103 is gone.
    The huge crystal shows it all. I still love the regular 103
    with that U shaped crystal, that’s unique and gives the watch that unique look.
    Geo

  2. Kyle S. says:

    Nice review. These watches are not for me, but I do like the name “Tarantula” :-)

  3. StefH says:

    What is the price of this unique watch?
    Couldn’t find it yet.
    I am a collector of watches with unique displays
    and this is one I don’t have (yet)

  4. mono says:

    Hi StefH, i’m not sure about the exact price. On the URWERK website you can find a list of authorised dealers and i’m sure they can tell you the price.

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