This is the first in-depth analysis of the various printings of Joseph Eckhel’s eight-volume Doctrina numorum veterum: the first Vienna edition (1792–1798), the second Vienna edition (published in the first half of the nineteenth century), and a nineteenth-century edition bearing a Leipzig imprint. Eckhel’s Elementa rei numariae veterum, a little-known related book first published in 1841, provides complementary evidence for the printing history of the latter two editions. The vicissitudes of the Doctrina’s publication are reconstructed on the basis of unpublished and published letters, as well as other contemporary documents.