Moritz Grossmann BENU Blue Steel

Moritz Grossmann is celebrating its 10th anniversary in November 2018. To mark this special occasion, the company will present a one-off piece from the BENU line, The BENU Blue Steel. A harmonious combination of a cool stainless steel case with a white grand-feu enamel dial and blue accents. The BENU Blue Steel is offered with the calibre 100.1 in the high-artistic-finish as a blue single edition 1 of 1.

The BENU Blue Steel showcases Moritz Grossmann’s finest watchmaking features and 19th-century craftsmanship. In a feature different to other BENU models, the hands on the BENU Blue Steel stand out in a beautiful deep blue. This armonises with the blue Arabic numerals and minute markers, as well as with elements inside the movement: the screws, the regulating nut and the back bushing are all also annealed in blue.

During his lifetime (1826-1885), Moritz Grossmann produced pocket watches, pendulum clocks and measuring instruments that became renowned for their beauty and accuracy. One of his trademarks were the very fine hands that enabled precise time reading on the watches and particular accuracy with the measuring instruments. Today, all hands on Moritz Grossmann watches are filed, ground and polished by hand and then annealed in colour over an open flame in the unchanged, historic method. The BENU Blue Steel is offered as a blue single edition 1 of 1.

Technical details

Model: BENU Blue Steel: White enamel dial, blue numerals, blue alligator strap

Manufacture calibre 100.1, manually wound, adjusted in five positions
Diameter: 36.4 mm, height: 5.0 mm
No. of parts: 198
No. of jewels: 20 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, Gerstenberger geometry
Balance: Diameter 14.2 mm; Frequency 18,000 semi-oscillations per hour
Power reserve: 42 hours when fully wound

Hours and minutes, subsidiary seconds with stop seconds,
Grossmann winder with pusher

Special features
Grossmann balance; lateral pusher for disabling the hand-setting mode and starting the movement; space saving and 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 engraved by hand; 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

Operating elements
Crown to wind the watch and set the time, pusher to start the movement

Three-part, stainless steel
Diameter: 41.0 mm, height: 11.35 mm
Crystal: Sapphire crystal on both sides, antireflection-coated on one side, crystal/display back

Grand-feu enamel, Arabic numerals
Hands: Hand-crafted, steel annealed to a blue hue

Hand-stitched alligator strap with steel buckle

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