From "Rosen und Sommerblumen" by Wilhelm Mütze, 1910, p. 63: "Hybrid Teas by O. Jacobs, Weitendorf in Mecklenburg. [clockwise from left:] 'Annamarie Jacobs', 'Grossherzogin Alexandra', 'Herzogin Marie Antoinette', Dora Hansen', 'Frau Nicola Welter'."