Moritz Grossmann receives patent for the BENU Tourbillon minute display

Launched in 2013, the BENU Tourbillon with the flying three-minute tourbillon incorporates several developments conceived by Grossmann’s watchmakers for which utility model or patent applications were filed: the V-shaped design of the balance bridge (utility model registered), the stop seconds mechanism with a hair brush (patent pending) and the double minute display (patent pending).

The MG Calibe 103.0.

In January 2018, the double minute display was the first of the new developments to receive a European patent (No. 2874021). To accommodate a particularly large tourbillon and an appropriately large tourbillon aperture in the dial of the BENU, the centre minute display relies on two scales. The outer scale is interrupted by the tourbillon aperture in the range from 25 to 35 minutes; the missing segment is replaced by the inner scale. When the minute hand transits the tourbillon aperture, its extension sweeps the inner scale, allowing precise readings during that ten-minute interval. The attractive and unusual solution lives up to the ambition of delivering uncompromising precision.