Lot 4192

Description

Pocket clinometer, Abney Mk.IV (Aust), made by J.W.Handley in Australia 1943, Reg. No.428, marked on the side 'D (upright arrow) D' (Defence Department), made in brass and consists of a hollow rectangular tube base with a semi-circular protractor screwed to one side that is used to adjust the elevation of a field gun when aiming artillery, with an arched vernier scale and an adjustable magnifying lens to view the scale, linked at the rear of the protractor is a glass bubble level which can be rotated 120 degrees using a stem winder and this bubble level is connected to a small arm with a scale at the tip and this arm slides along the protractor indicating the angle of elevation reached and there is a locking pin to ensure accuracy. Very fine.