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Objects
Orthops Slide Rule MANUFACTURING AND DISPENSING EQUIPMENT slide rule Raphael's Ltd Europe: United Kingdom Mid 20th c. plastic; metal overall: 83 x 175 x 7 mm
White plastic rule with metal slide. Includes apical radii curves and a projection scale.
2003.220
Ex Keeler Collection
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Orthops Slide Rule Raphael's Ltd 2nd quarter 20th c. ViewOrthops Slide Rule used at Heriot Watt College Raphael's Ltd Mid 20th c. View