Hermann Zapf designed Virtuosa I (1952), Virtuosa II (1953) and Virtuosa kräftig (bold, 1957) for Stempel. [Reichardt]
In 2009, Akira Kobayashi created an official digital version together with Zapf. This Virtuosa Classic merges the letter variants of I and II in one OpenType font. It is more inclined than the metal original. Viceroy JF (JAW Fonts, 2000) is based on Virtuosa kräftig.