Large Circular Protractor or Navigational Plotter – Chas. Smith, 1910
Remarkable navigational protractor with cross piece in a green baize lined mahogany case. With a 0-360 degree scale and four 0-90 degree scales in the quarters. Diameter 30.6 cm.
Made by Chas. Smith, London and used by the War Department.
D: 30.5 cm (1 foot)
Signed: C.S © Ltd. And B.033 – W10?VC/1320