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Ruxton Multi-Vider drop-lead pencil & slide rule
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Rare Otis King Model K - white scales on black background
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Pocket Hexadecimal Slide Adder for Computer Programmers
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Post 1824 Dring & Fage Alcohol Gauging Rule
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Darnley’s Rotable Lightning Calculator/Pencil Case
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Lawrence Antenna (classified by UK & US during WWII) for Radar Beam Pattern Detection
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Makeba Kombinator pencil & slide rule
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Rare Carbic-made Fischer Calculator
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For Calculating Strength of Liquids in Twaddells !!
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PTT rule for Cable Radio (Signal Loss/dB)
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Smallest drum (≈ 2.4m) made by LOGA
