The Limited Edition Atum Pure Skull from Moritz Grossmann

The Limited Edition Atum Pure Skull from Moritz Grossmann

December 28, 2017

Moritz Grossmann recently unveiled the limited edition Atum Pure Skull.

The Atum Pure line is characterized by focused precision, forming the perfect framework for a motif dial. As was the case with the Atum Pure M and Atum Pure L, the face of the watch features two prominently designed rings for the minute and hour indications. In place of the Atum Pure M’s “Mesh” and the Atum Pure L’s “Long Hole” dial inserts, the Atum Pure Skull showcases a stylized skull in its center.

It is a proprietary design that reveals interesting glimpses of the caliber 201.1 movement. The skull is milled and wire-cut with electrical discharge machines in the manufacture, its surface polished or sandblasted to match the case, and then assembled with the remaining dial elements. This individualized manufacturing approach lends itself to dials with other popular motifs or heraldic symbols.

The hands are manually crafted in the manufacture as well. For the Atum Pure Skull, the lance-shaped stainless steel hands are filled with black HyCeram to coordinate with the markers.

The Movement: A glance through the display back reveals the caliber 201.1 with the “Pure-Classic” finish. It was specially designed to be cased in stainless steel. The German silver plates are shot-peened with glass beads for enhanced aesthetic appeal. Shot peening mattes the surface, making it highly sensitive. Great care must be taken in the assembly phase for this reason. The white sapphire bearing jewels, a Grossmann hallmark, are pressed directly into the plate. The movement screws are polished flat and retain their original steel hue.

Endowed with the Grossmann balance, the Grossmann winder with pusher, the modified Glashütte stopwork, and the Grossmann micrometer screw, this caliber highlights the manufacture’s typical features as well as Grossmann’s pure watchmaking artistry.

The Atum Pure Skull is available with stainless steel and blackened stainless steel cases. Both versions will be produced in 10-piece limited editions.

Atum Pure Skull

Technical Specifications


  • Hand-wound manufacture caliber 201.1
  • Adjusted in five positions
  • Balance: 14.2mm
  • Frequency: 18,000 semi-oscillations per hour
  • Power Reserve: approximately 42 hours


  • Hours
  • Minutes
  • Subsidiary seconds with stop seconds


  • Stop seconds for hand-setting with lateral pusher to restart the movement


  • Diameter: 41mm
  • Height: 11.35mm
  • Three-part case in stainless steel or blackened stainless steel
  • Sapphire crystal caseback


  • Six-part stainless steel, with stainless steel insert
  • Hands: polished stainless steel with HyCeram filling


  • Hand-stitched alligator