The Vintage Lotus Flower Brand Abacus.  This 13-rod, 91-bead Suanpan (Chinese Abacus) is a classic tool for both calculation and decor. Featuring the traditional 2/5 bead configuration (2 beads on the top deck, 5 on the bottom), it allows for complex arithmetic including addition, subtraction, multiplication, division, and even square roots.

Key Features:

• Capacity: 13 columns allow for numbers up to the hundreds of billions.

• Traditional Design: 91 beads in total, utilizing the time-tested bi-quinary system.

• Versatile: Perfect for students learning mental math, collectors of mathematical instruments, or as a unique desktop accent.

• Durable: Manual operation means no batteries or power required—ever.

       9.5" x 5"