Mercedes Euklid calculating machine, hand driven, no.2397, made by the Mercedes Bureau Maschinen, Ges.m.b.H., Berlin; with metal cover, "Kamp" lock, and 2 keys Mercedes Euklid calculating machine 1914
Mercedes-Euklid hand-driven calculating machine, model 15, serial no.14074, circa 1905, with metal cover Mercedes-Euklid hand-driven calculating machine 1905-1910