RecordGunner's callipers< 1 of 1 > Back probably made in London
Gunner's callipersGunner's callipers were used for making shot measure and artillery calculations. These brass callipers were made in the late 18th century, probably by George Adams, a scientific instrument maker based in London. This side is marked by the hinge 'Adams London'. The upper arm is marked with scales for 'Brass Guns/ Proof/ Service', the lower with scales for 'Iron Guns/ Proof/ Service'. These indicate specific weights and quantities of powder for particular guns. The callipers consist of two flat brass blades hinged so that they slide freely over each other, allowing the steel tips to point either inwards to indicate take the diameters of shot, or outwards to measure the bore of a gun. Record detailsTo search on related items, click any linked text below.
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