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Logarithmic Ruler KL-1 Round Lineup Calculator Slide Rule Rare USSR on E-Bay starting at $40.00
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Very rare Logarithmic Ruler KL-1 Round Lineup Calculator Slide Rule USSR on E-Bay starting at $205.00
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Very rare Logarithmic Ruler KL-1 Round Lineup Calculator Slide Rule USSR on E-Bay starting at $150.00
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Logarithmic Ruler KL-1 Round Lineup Calculator Slide Rule Rare USSR on E-Bay starting at $55.00
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HP-55 Mathematics Programs (1974) - Calculator Math Programming, Hewlett-Packard on E-Bay starting at $21.95
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Engineer Logarithmic Mathematical Circular Slide Rule KL-1 Calculator USSR on E-Bay starting at $40.00
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CASIO Fx-991ex Classwiz Advanced Engineering Scientific Calculator-552 Functions on E-Bay starting at $22.99
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Engineer Logarithmic Mathematical Circular Slide Rule KL-1 Calculator USSR on E-Bay starting at $44.99
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#15 of 19, RARE VTG 1950's? PAPER SLIDE RULE FLEXIBLE SHAFTING TORQUE CALCULATOR on E-Bay starting at $27.99
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