Moritz Grossmann Tourbillon with flying three-minute tourbillon and stop seconds using a brush of (your?) hair (Benu Collection)


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The Moritz Grossmann Tourbillon is their current masterpiece and the top timepiece of the BENU collection.

This timepiece possesses a flying three-minute tourbillon with stop seconds.  This is one of the most impressive horological accomplishments.

Talking about customization of your watch:

The “stop seconds” is a the patent-pending system which pauses the operation of the balance wheel in this Moritz Grossmann tourbillon and uses a fine “elastic brush with human hair” which in turn stops the balance wheel. You may wonder why the balance wheel should temporarily stop? Well, this allows the wearer to more precisely set the time, as without a stop-seconds function, when you pull the crown out, the seconds hand keeps moving. By stopping it, you can set it exactly to the second. Most, not all, tourbillon watches do not have a stop-seconds system.

The complex choreography of mechanical precision can be admired through the sapphire-crystal back. It expresses technical virtuosity and stands for traditional craftsmanship.

Technical details:

The movement is calibre 103.0.

Cage diameter

16,0 mm

Cage speed

1 revolution in three minutes, anti-clockwise when viewed from dial side

Balance diameter

14.2 mm, frequency 18,000 semi-oscillations per hour

Power reserve

72 hours when fully wound

Operating elements

Crown in 750/000 white gold to wind the watch and set the time, pusher in 750/000 white gold to start the movement

Case dimensions

Diameter: 44.5 mm, height: 13.8 mm

Movement dimensions

Diameter: 38.4 mm, height: 7.1 mm


Three-part, in 750/000 white gold


Solid silver, three-part, argenté or black, with Arabic numerals


Hand-crafted, steel, annealed to a brown-violet hue or stainless steel

Crystal / display back

Sapphire crystal, antireflective coating on one side


Hand-stitched alligator strap with butterfly clasp in 750/000 white gold


Press publications on the Tourbillon by Moritz Grossmann:

A Detailed Look at the Moritz Grossmann Benu Tourbillon

Please inquire for pricing and bespoke options.