Details
An oxidised-brass Abney's level,
signed Wilson London, with silvered scale, vernier and magnifier, with tangent screw adjustment and bubble level -- 4¼in. (10.8cm.) wide; and a military pattern combined compass clinometer, with silvered dial, unsigned, in leather case -- 4in. (10.2cm.) wide (A Lot) (2)
signed Wilson London, with silvered scale, vernier and magnifier, with tangent screw adjustment and bubble level -- 4¼in. (10.8cm.) wide; and a military pattern combined compass clinometer, with silvered dial, unsigned, in leather case -- 4in. (10.2cm.) wide (A Lot) (2)