Reduced to perfection



Pure, the attribute of Grossmann‘s philosophy, also identifies the manufacture‘s steel models. Their hallmark is concentration.

Reduced to the essential functions, the steel case is the perfect reflection of its form. The ATUM model family stands for reduction in perfection.


The dial

The winding crown and the pusher

The hands

The dial

The ATUM Pure amplifies the appeal of classic precision measuring instruments. Its single-part dial has a fine brushed texture coated with lacquers of different colours to enhance the subtle metallic effect. The recessed seconds subdial is sharply contoured with a burnished chamfer.

The applied hour markers are particularly plastic and prominent. They contrast brilliantly against the white, grey, and blue dial variants.

The winding crown and the pusher

The gently curved form and the tapered chamfer of the strap lugs enhances the eloquent silhouette of the case.

Aesthetic and functional — the circumferential groove makes it easy to pull out the crown. The pusher for the new handsetting train is set directly below the winding crown.

The hands

Special hands are manually crafted in-house for the ATUM Pure. Designed to match the markers, the lancet-style hands feature straight edges and broad chamfers that contribute to their slender yet corporeal looks.

They are made of stainless steel that retains its remarkable toughness after tempering. To optimise legibility, pockets are worked into the hands and then filled with white “Hy- Ceram“, a compound that consists of ceramic powder and resin. Then, the tips of the hands are precision ground. Finally, they are polished to a mirror gloss, including the white fillings.

The calibre 201.0

Discover everything about the heart of the ATUM Pure.

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Tech Specs


Manufacture calibre 201.0, manually wound, adjusted in five positions

Special features

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; separately removable clutch winding mechanism; stop seconds for handsetting


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

No. of parts


No. of jewels

20 jewels


Lever escapement


Shock-resistant Grossmann balance with 4 inertia and 2 poising screws, Nivarox 1 balance spring


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

Power reserve

42 hours when fully wound

Operating elements

Crown for winding the watch and setting the time, pusher to start movement

Case dimensions

Diameter: 41.0 mm, height: 11.35 mm

Movement dimensions

Diameter: 36.4 mm, height: 5.0 mm


Three-part, stainless steel


Hand-crafted, hour and minute stainless steel, polished, with white HyCeram filling, subsidiary second steel

Crystal / display back

Sapphire crystal, antireflection-coated on one side


Hand-stitched alligator strap with prong buckle in stainless steel

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