In comparison with the traditional Skeleton Pure models, the timepiece specially created by Armin Strom for Only Watch has a main plate and bridges coated with black PVD.
Calibre ARM09-S is a manual-wind, double-barrel movement with an eight-day power reserve. The dial exhibits hours, minutes, small seconds and power reserve indicator. Armin Strom designs its watches so the more intricate side of the calibre is visible on the dial side. When the Skeleton Pure is wound, the double-barrel movement creates an engaging animated display.