A rare late 19th-century patent Chronemetrophon by Hellmuth Ahlgrimm, Roschnowe bei Chornik (Posen), patented 31 March 1894, the clock-wonk mechanism with pendulum, two bells, dial and universal bubble level on oak base with three adjustable screw feet 11in. (28cm.) high See illustration

细节

A rare late 19th-century patent Chronemetrophon by Hellmuth Ahlgrimm, Roschnowe bei Chornik (Posen), patented 31 March 1894, the clock-wonk mechanism with pendulum, two bells, dial and universal bubble level on oak base with three adjustable screw feet 11in. (28cm.) high See illustration

更多详情

See illustration

拍品专文

A copy of the patent document, with drawing accompanies this lot.