Limited Edition

Instrument 91 with Sekundenarret

On the occasion of our 157th birthday on April 21, 2022., we are also producing the Instrument 91 with seconds zeroing in a small series.

To precisely set the time of a wrist watch most movements are equipped with a second stop – when the crown is wound, the second hand doesn’t move. The seconds zeroing is a much rarer design. When the crown is wound, the second hand continues to run until it reaches “60” and then it automatically stops – thus it is possible to use a time signal to set the watch to the second.

In all likelihood, this will be the last series with a seconds zeroing function to leave our workshop. From today's point of view, an edition of a movement with this function does not seem possible, as it would require an expense which doesn’t seem economically justifiable.

The Movement

For this pilot's watch with a small second, we decided to produce a new movement variant based on the base plates of the HS81 caliber family that we already have: the HS81.4. The HS81 caliber is based on the construction of the Unitas 6497 Lepine caliber whose plates we have adapted and extensively decorated.

Size comparison

Based on the size values, it is not easy to decide whether the watch fits the wrist, or whether it is too big or too small. To make your decision easier, we have mounted the watch on three different wrist widths that correspond to the usual sizes.

How to determine the correct strap length?

Please note that the wrists shown can only give you an approximate impression of the watch on your wrist, as the shape of the wrist is different for everyone, even if they have the same circumference.