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, hand driven, no.2397, made by the Mercedes Bureau Maschinen, Ges.m.b.H., Berlin; with metal cover, "Kamp" lock, and 2 keys