Details
A Telegraph relay
by Froment, No. 0, with two pairs of coils and spring-tensioned pivoted contacts, in lacquered brass with mahogany base on bun feet and glazed brass cover -- 12in. (30.5cm.) wide
by Froment, No. 0, with two pairs of coils and spring-tensioned pivoted contacts, in lacquered brass with mahogany base on bun feet and glazed brass cover -- 12in. (30.5cm.) wide