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Tom & Jerrys Militaria and Collectables

Military Alidade with Parallel MKII Rule with case by R E-Co

Military Alidade with Parallel MKII Rule with case by R E-Co

Regular price £145.00 GBP
Regular price Sale price £145.00 GBP
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Product Description

Sight, Alidade with Parallel Rule for use with Field Plotting Board for artillery use. Blacked Brass. 

An Alidade is a device that allows a Gunnery Officer to sight a target some distance away and then draw a line on a plotting (or plane) table. It consists of a flat ruler with hinged vanes at each end that is raised to make a sighting. One of the vanes has a narrow slit for sighting through and the other has a wire hairline. It is aligned with the target while on the plotting table and supposing a map or other drawing has been aligned correctly, to the North for example, then it will give the bearing of the target with respect to the North. This alidade has a parallel rule attached.