Search For sale
Use the down arrow to enter the dropdown. Use the up and down arrows to move through the list, and enter to select. To remove the current item in the list, use the tab key to move to the remove button of the currently selected item. Use Escape to close the dropdown and return to the search box.
No results found
For saleServicesJobsRentals
Navigate Categories by tabbing to the major areas. Use the Down key to open the subcategory and then use the Down key once more to enter it. Navigate the subcategory using the Up and down keys. Once on the subcategory you are interested in. Use the Enter key to navigate to that page.

Take action

$50

Vintage Monsanto / Takeda Circular Slide Rule – Working Dial – 1959 Reference Card

Posted 3 days ago in Huntington Beach, CA

Listed in categories:

Sold by

Mike Hathaway

Mike Hathaway

Joined Oct 2026

Chat securely on the app

Image #1

Additional images

Description

Unusual vintage Monsanto Chemical Company promotional circular slide rule, manufactured by Takeda in Japan. Features the classic Monsanto logo and the slogan “chemistry on the move to the future.” Measures approximately 3 × 4⅜ inches. Features: Circular logarithmic slide-rule calculator Circular dial tested — rotates freely Slide-out scientific reference card — operates properly Periodic table of the elements Temperature conversion chart Engineering conversion tables and scientific constants Reference card marked Model CTS 552, Sama & Etani, Boston, Massachusetts Made in Japan Reference card bears a 1959 copyright notice Good used vintage condition with age-related discoloration and handling wear. Mechanically functional; mathematical accuracy has not been independently verified. An interesting collectible for slide-rule enthusiasts, engineers, chemists, and collectors of vintage Monsanto advertising or scientific instruments. $50 or best reasonable offer.

All content is available to screen readers from the outset. The See more button is for visual users only to expose content incrementally that is already available to you

Details

Condition

Used (normal wear)

All content is available to screen readers from the outset. The See more button is for visual users only to expose content incrementally that is already available to you

Item location map

Map is approximate to keep seller’s location private.

Related searches

Mike Hathaway's other offers