细节
A part goneostat outfit
in mahogany case with steel and lacquered brass goneostat signed Holtzapffel, three powder tins, two (of three) slides with lapping plates and a vertical cutting frame; and a home-made device incorporating brass epicyclic and bevel gears (2)
in mahogany case with steel and lacquered brass goneostat signed Holtzapffel, three powder tins, two (of three) slides with lapping plates and a vertical cutting frame; and a home-made device incorporating brass epicyclic and bevel gears (2)