Check the listing for details. Slide Rule - Engineering Instruments, Inc. 250-V w/case & instructions. Condition: Used. Listed at 9.99 USD. Slide rule with original cursor, case and instruction book. Instruction book is curled from being wrapped around the case, and has tears in the first couple of pages. (See pictures. Paper weight not included - it's just there to hold the instructions open for the pictures).
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