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Antiques of Science & Technology W26-03. Otis King Model K Cylindrical Calculator English, This slide rule carries a spiraled, logarithmic scale 66" long giving 3 digit readability in a small package of overall dimensions 1.5"dia. x 6" closed and 8Ó fully extended . In many ways this is a descendant of the George Fuller technology, see item 26-2. The calculator comes with the original instruction manual and box. The box has the same serial number, X5599, as the rule and includes a 1"x 6.5" plastic covered cardboard with conversion table for decimals to fractions on one side and a table of decimal parts of the British pound on the other. A very nice rule in excellent condition.
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