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Slide rule : Captain R Wishart, Johannesburg Mounted Rifles
Heraldry
Maker: Unknown
Twelve inch two-fold wooden slide rule with a brass hinged centre and brass end caps. The rule is designed for ranging and finding artillery and is fitted with a spirit level, two sighting mechanisms ...REL36081.001
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Slide rule : Flying Officer A J D Leslie, 463 Squadron, RAAF
Heraldry
Maker: Hemmi's Slide Rule
Ten inch bamboo slide rule with a two part hardboard case. It has an inch scale side ruler, over-range scale extensions, framed perspex cursor, reversible slide with three additional scales and a rear...REL30735