Keuffel & Esser Slide Rule Archives
4053-3
4056
4058W
4070-3
4080-3
4081-3
4088-3
4092-3
4095-3
4097
4139
4161-1
4181-1
4181-3
68 1100
68 1210
Last Updated on July 24, 1999 by John Current
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