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  • Description is exactly "Three slide rules with cases, and one slide rule invoice. Aristo-HyperboLog Nr. 0971 Made in Germany DBGM (with two-piece, hard plastic case) Rule is 13 1/4 inches long. Keuffel & Esser Co. Invoice SF 13334 dated 7/17/62 for 4081-5S Rule for $55.55 K&E slide rule 32 1/2 inches long. SLAC REC4082M. With leather case. Pickett Synchro-Scale slide rule. Pickett & Eckel, Inc. Chicago 108. 12 1/16 inches long. With leather case."

2005-007 Slide Rules

Three slide rules with cases, and one slide rule invoice. Aristo-HyperboLog Nr. 0971 Made in Germany DBGM (with two-piece, hard plastic case) Rule is 13 1/4 inches long. Keuffel & Esser Co. Invoice SF 13334 dated 7/17/62 for 4081-5S Rule for $55.55…