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Title: telescope variable power No1 [Go to resource]
Description: Used for observing the fire of siege artillery. Magnification 7 to 21 diameters, fiels 4.5 to 1.5 deg, fitted with glass diaphram engraved with vertical graticules 1,10,30,60 & 90 minutes right and left of the axis. It is used with a tripod having telescopic tubular steel legs. Publisher: http://www.iwm.org.uk Source: Imperial War Museum Identifier: http://www.iwm.org.uk/collections/item/o... Go to resource More Like this...
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