Vintage Abacus Wood Brass Hop Cheong Tai Brand Book by Kwa Tak Ming

Chinese Abacus Suanpan Vintage Wood & Brass Lotus Flower Brand 13 Row 91 Bead

Chinese Abacus Diamond Brand – Cherry Color Wood Brass Adornment

Chinese Double Abacus Soroban Wood/Brass 21 X 2 Rows 294 Red Beads 21″ L 12″ W

Vintage Chinese Abacus Wood & Brass Lotus Flower Brand Calculator 13 Row 91 Bead

Vintage Chinese Abacus Wood & Brass Lotus Flower Brand Calculator 13 Row 91 Bead

Vintage Wooden Abacus Black Beads Brass Hardware Mid Century MCM Decor 11.5in

Chinese Bead Abacus-77 beads with Bead Arithmetic Manual Wood+Brass

Vtg Chinese Abacus Wood & Brass 13 Rows Math Decor Study Office Collectible

Wood & Brass Locking Box Shanghai China W/Lock & Key Jewelry Trinket – Vintage