Moritz Grossmann ATUM ‘Schaffo’ Skeleton

Moritz Grossmann, the independent Glashütte watchmaker, will celebrate its 10th anniversary in November 2018. As part of the celebration, the company will present the ATUM ‘Schaffo’ skeleton, a one-off piece created in collaboration with iconic Swiss watchmaker and designer, Christophe Schaffo.

Moritz Grossmann formulated the ideal of “designing a simple but mechanically perfect watch” in the 19th century. With the ATUM ‘Schaffo’, the functionality and beauty of the mechanism are apparent at first sight. The dial consists of an elegant, narrow ribbon of rhodium-plated German silver featuring the minute markers, revealing the exquisitely finished movement, where each component has been chamfered, chased and engraved by hand. Every movement of the dial train, balance wheel and other parts of the mechanism demonstrates the artistry and technique that went into making this timepiece.

Blackened stainless steel is used for the case, winding crown and pusher which – along with the black alligator leather strap – form a stunning contrast to the dial. Schaffo’s artistic creativity, technique and craftsmanship are outstanding and renowned around the world. He painstakingly stamped, cut and milled to minimise the material used for the caliber 100.5 in the ATUM ‘Schaffo’. The result is a masterpiece of skeletonisation.

The Moritz Grossmann brand manufactures timepieces to the highest standard of craftsmanship under the tagline “Schönstes deutsches Handwerk”. The ATUM ‘Schaffo’ brings together the craftsmanship of two masters – the Swiss artist Christophe Schaffo and the German watchmaking pioneer Moritz Grossmann. The one-off watch includes the name C. Schaffo on the ratched wheel and is a single edition 1 of 1.

Technical details

Movement
Manufacture calibre 100.5, 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

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

Special features
Skeletonized and hand engraved movement; Grossmann balance; lateral pusher for disabling the handsetting 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 skeletonized plate and frame pillars in rhodium plated German silver; ratchet wheel with the name C. Schaffo; 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

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

Hands
Hand-crafted, steel annealed to a brown violett hue

Strap
Hand-stitched alligator strap with steel buckle black

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