Found on Mat: "Mark of Valentine Curio, Basle. Used in works of 1523; 1522 in Georgii Trapezuntii rhetoricorum libri S. Basle. By H. Holbein according to Butsch, p. 51
Hans Holbein, the younger
Hans Holbein, the younger, 1540
Hans Holbein, the younger, 1517
Hans Holbein, the younger, 1527