Moritz Grossmann BENU Power Reserve Anniversary

On 11 November 2008, Christine Hutter founded Grossmann Uhren using the great name of Moritz Grossmann, the co-founder of the Glashütte watch industry. The BENU Power Reserve Anniversary is a celebration of the company’s tenth birthday with a special engraving done by hand to honours Moritz Grossmann.

In a nod to the special anniversary of the manufactory, the rose gold BENU Power Reserve Anniversary has ‘2008 – 2018’ engraved on the left side of the case by hand. In addition, Moritz Grossmann’s initials have been engraved on the upper right-hand side of the casing between the crown and strap.

The wafer-thin hands annealed in brown, solid silver dial is adorned with Fine Arabic numerals, giving the face of the watch its special elegance. Thanks to their fineness, they are reminiscent of the precision instruments produced by Moritz Grossmann in the 19th century.

Craftsmanship meets innovative mechanics with the barshaped opening under the Moritz Grossmann logo, revealing a power reserve indicator. When the movement is fully wound, it is completely white and shows an increasing amount of red as the watch runs out. Grossmann’s manual winding with pusher provides a perfected hand setting mechanism.

The BENU Power Reserve Anniversary is offered with the calibre 100.2 in a High-Artistic Finish as a single edition 1 of 1.

Technical details

Movement
Manufacture calibre 100.2, manually wound, adjusted in five positions
Diameter: 36.4 mm, height: 5.4 mm
No. of parts: 227
No. of jewels: 26 jewels, 3 of which in screwed gold chatons
Escapement: Lever escapement
Oscillator: Shock-absorbed Grossmann balance with 4 inertia and 2 poising screws, Nivarox 1 balance spring with No. 80 Breguet terminal curve, Gustav Gerstenberger geometry
Balance: Diameter: 14.2 mm, frequency: 18,000 semi-oscillations per hour
Power reserve: 42 hours when fully wound

Functions
Hours and minutes, subsidiary seconds with stop seconds, Grossmann winder with pusher, power-reserve indicator

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

Case
Three-part, precious metal
Diameter: 41.0 mm, height: 11.65 mm
Crystal/display back: Sapphire crystal, antireflective coating on one side

Dial
Solid silver, argenté, with Arabic numerals
Hands: Manually crafted, steel or stainless steel

Strap
Hand-stitched alligator strap with prong buckle in precious metal

Special features
Grossmann balance; hand setting override and start of movement with lateral pusher; bar-shaped power-reserve indicator with two-coloured display segment driven by a differential wheel train; space-saving modified Glashütte stopwork with backlash; adjustment with Grossmann micrometer screw on a cantilevered balance cock; pillar movement with 2/3 plate and frame pillars in untreated German silver, 2/3 plate, balance cock and escape-wheel cock hand-engraved; broad horizontal Glashütte ribbing, 3-band snailing on the ratchet wheel, raised gold chatons with pan-head screws; separately removable clutch winder; stop seconds for hand setting

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