Vintage Bamboo Slide Rule Instruction Manuals - Ricoh & Sun Hemm
$20
Pair of original vintage mid-century Japanese bamboo slide rule user manuals. Ideal for math/engineering collectors looking to complete a vintage calculation kit. Includes: 1 "Instructions for the Use of Your 'RICOH' Bamboo Slide Rule" - Published by Ricoh Keiki Co., Ltd. (Tokyo, Japan). 2 "Brief Instructions: Hemmi No. 40RK Slide Rule" - 10" (25 cm) For the Beginner. Published by Hemmi Slide Rule Mfg. Co., Ltd. (Tokyo, Japan). Both show light vintage shelf wear and age-related tanning consistent with their age, but all pages are fully intact and completely legible. Selling together as a pair. Please message with any questions!
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