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.