The BENU marks the dawn of the manufacture. With its puristic design on the outside and the hidden finesse inside the case, it reflects the heritage of Moritz Grossmann but is clearly anchored in the here and now.

In the three-part gold or platinum case, nearly 200 hand-crafted parts interact with great precision. Visible through the sapphire-crystal caseback, they manifest innovative artisanship.


The bezel

The signet

The subsidiary second

The sapphire-crystal

The crown

The butterfly clasp

The verso

The bezel

A slender gold or platinum bezel frames the solid-silber dial. With its crisply defined Arabic numerals, the watch radiates individuality and discreet elegance. The brown-violet or brown hands with sharp tips display the same unusual hue as the exposed screws inside the movement.

The signet

In the middle of the upper dial hemisphere, beneath the “12”, the watch displays the traditional signature MORITZ GROSSMANN GLASHÜTTE I/SA. The small arc above the name symbolises the brand-typical cutout in the 2/3 plate of the movement which showcases its beating heart, the screw balance, when viewed through the sapphire-crystal caseback.

The subsidiary second

Following an old tradition, the subsidiary seconds dial stands above the “6” and is slightly recessed to allow the hour and minute hands to hover as closely as possible over the dial. The precision scales and the slenderness of the hands is a reminder that a watch is intended to keep time accurately. Indeed, its aesthetic clarity is reminiscent of a Glashütte precision instrument from the 19th century.

The sapphire-crystal

A sapphire-crystal glass protects the dial. It has an antireflective coating on one side to prevent viewdisturbing reflections of incident light. The extra-thick slightly cambered glass has a precision-ground chamfer that refracts the geometry of the succinct minute scale.

The crown

The shape of the crown is both aesthetic and functional. A circumferential recess makes it easy to pull the crown for setting the time, and its angled flutes add leverage for winding. The lugs to which the strap is fastened are endowed with a tapered chamfer that creates a flowing silhouette.

The butterfly clasp

The ends of the carefully hand-stitched alligator strap are secured with a butterfly clasp that makes it easy to put on and take off the watch. It is also crafted from gold or platinum and features a pushbutton catch.

The verso

The antireflective-coated sapphire-crystal display back exposes the rich inner life of the watch with its remarkable depth. The curved, milled cutout of the German silver 2/3 plate, a typical Grossmann hallmark, places the spotlight on the large screw balance and its breathing hairspring. The plate itself bears the hand-engraved brand signature MORITZ GROSSMANN GLASHÜTTE I/SA accompanied by traditional data concerning the movement. Three screwed gold chatons attract just as much attention as the white sapphire bearing jewels and the screws that are naturally annealed over an open fire. Wide striping on the plate and the three-band snailing on the ratchet wheel complement the suave orchestration of a harmonious opus.

The movement serial number on the plate and the case number on the screwed back allow coming generations to trace the history of the watch to its origins.

This compact work of art, composed of 188 individual parts, clearly stands for ORIGIN OF A NEW TIME.

The calibre 100.0

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manufacture calibre 100.0, manually wound, adjusted in 5 positions

Special features

Plate movement with 2/3 plate and frame pillars made of untreated German silver, 2/3 plate as well as balance and escape-wheel cocks manually engraved, broad horizontal Glashütte ribbing, three-band snailing on the ratchet wheel, screwed, raised gold chatons, separately removable clutch winder, modified Glashütte stopwork with controlled backlash, adjustment with Grossmann micrometer screw on cantilevered balance cock, handsetting with stop seconds


Hours and minutes, subsidiary seconds with stop seconds

No. of parts


No. of jewels

17 jewels, of which 3 are in screwed gold chatons


Lever escapement

Oscillation system

shock-resistant screw balance with Breguet overcoil shaped after G. Gerstenberger


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

Power reserve

42 hours when fully wound

Operating elements

crown 750/000 gold, for winding the watch and setting the time

Case dimensions

Diameter: 41.0 mm, height: 11.1 mm


Durchmesser: 36,4 mm, Höhe: 5,0 mm

Movement dimensions

Diameter: 36.4 mm, height: 5.0 mm


Solid silver, with Arabic numerals


hand-made, steel, annealed to a brown-violet or brown hue

Glass and caseback

Sapphire crystal, antireflective coating on one side


Hand-stitched alligator strap with butterfly clasp in solid precious metal



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