Krupp mountain sight

The Krupp mountain sight consisted of a short telescope bent at right angles, mounted on a rocking bar. One end of the bar is supported on a spiral cam; on the same axis as the came was a drum about 60 cm in circumference, graduated in metres of range. The bar also carried a clinometer level adjustable for angle of sight. The whole sight could be mounted on a pivot parallel to the axis of the gun, so that it could be cross-levelled to correct for difference of level of wheels. The telescope was mounted on a graduated circular plate, so that it could be directed on an aiming point at any angle.

The telescope had a field of about ten degrees, and it was of low magnifying power. On looking down into it from a distance of a few centimetres the layer saw a brightly illuminated picture of the foreground, with a pointer in the middle of the field.

The gun was sighted on the right-hand side at the extreme rear end of the cradle, well clear of the wheels. The telescope was inclined to the right, so that the layer had not to put his head behinf the recoiling gun.

SOURCE : BETHELL. Henry Arthur : Modern Guns and Gunnery, 1910. A Practical Manual for Officers of the Horse, Field and Mountain Artillery. Woolwich : F.J. Cattermole 1910, pp. 356-357.