W. Warnaar system Flight course calculator

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W. Warnaar system Flight course calculator, Netherlands with Octrooi request Circa 1936. De scales are in KM- and Myles an Hour. There is also a turning wheel with 360 degrees scale. The instrument was sold by Short & Mason Ltd, instrument house in London. Length 22 cm

SKU: 00 371117 i S Categories: ,

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