About this item

• Fully functional and well-crafted set of Napiers Bones, the first calculator designed in 1617 by John Napier
• Includes 2 full sets of rods for increased versatility and complex number manipulation
• Designed by John Napier in 1617 - This has been helping people learn math for centuries. Includes 2 full sets of rods for increased versatility and complex number manipulation
• Comes With Cover - Makes for easy travel and storage - Measures about 7.5" x 7.5" in the frame
• Perfect tool for educators and a must-have for math geeks to better understand their roots
• Designed and made in USA by Creative Crafthouse, a small family business in Hudson, FL. Thank you for your support.