Details
A barograph,
signed on the oxidised-brass base-plate NEGRETTI & ZAMBRA LONDON, with brass mechanism and recording drum, oak plinth base and glazed cover with metal grill end sections -- 13¼in. (33.7cm.) wide
signed on the oxidised-brass base-plate NEGRETTI & ZAMBRA LONDON, with brass mechanism and recording drum, oak plinth base and glazed cover with metal grill end sections -- 13¼in. (33.7cm.) wide