Montblanc predominantly uses bought-in ETA or Valjoux movements. With the acquisition of the manufacture Minerva, Montblanc has by now also genuine manufacture calibres available, used above all in the higher-priced Villeret line, in limited quantities (1, 8 and 58, which simultaneously gives Minerva's founding year). A broader in-house production in the middle price segment is not planned, since the development of own movements requires very high investments and is hardly economically viable for the smaller quantities beyond the 10,000-euro mark. Larger manufacture quantities, as realised e.g. by Rolex, are structurally different from such strategies.