An oxydised brass bearing plate compass, unsigned, in mahogany case -- 8¼in (21cm) wide; a Hilger Watts clinometer in case; and an azimuth circle in case

细节
An oxydised brass bearing plate compass, unsigned, in mahogany case -- 8¼in (21cm) wide; a Hilger Watts clinometer in case; and an azimuth circle in case
See illustration (part lot) (3)