Introduced as a unique piece as a part of Moritz Grossmann’s 10th anniversary collection, the ATUM White Brown watch combines classic design elements in white and brown with a stainless steel case and an artistic, hand-finished movement.
A balanced colour scheme and the calibre 100.1 in a high-artistic finish set this watch apart from the crowd. The ATUM White Brown also reflects a feature of the present-day manufactory – the striking use of steel annealed in brown.
The colour scheme is mirrored in the markers and hands alongside the alligator leather strap. Inside the movement, the screws in their gold chatons, the regulating nut and the back bushing are also annealed in brown by hand. The ATUM White Brown is offered with the calibre 100.1 in an artistic hand finish as a single edition 1 of 1.
Manufacture calibre 100.1, manually wound, adjusted in five position
No. of parts: 198 Diameter: 36.4 mm, height: 5.0 mm
No. of jewels: 20, of which 3 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
Hours and minutes, subsidiary seconds with stop seconds, Grossmann manual winder with pusher
Crown to wind the watch and set the time, pusher to start the movement
Grossmann balance; handsetting override and start of movement with lateral pusher; 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
Three-part, stainless steel
Diameter: 41.0 mm, height: 11.35 mm
Crystal and display back: Sapphire crystal, antireflective coating on one side
White, stainless steel hour markers annealed in brown
Hands: Manually crafted, steel, annealed in brown
Hand-stitched alligator strap with prong buckle in stainless steel