School teacher hanging on blackboard wooden abacus. Size:77x21.5x3.2cm/30.31x8.46x1.25inches(LxWxH). Metal edge angle protection abacus,wooden columns,contains rubber strap. The abacus was a calculator invented sometime between 1000 BC and 500 BC in China, often constructed as a wooden frame with beads sliding on wires. It was in use centuries before the adoption of the written Hindu-Arabic numeral system and is still widely used by merchants and clerks in China, Japan, Africa and elsewhere. The abacus is also widely used in teaching counting and mathematics. Wooden Frame- This is a 17 digit professional soroban abacus with a beautiful wooden frame. The design alone makes this abacus worthy of being a decorative piece as well as a counting tool for trade and education. Package included:1 Large Teacher Abacus. Check size before purchase, thank you very much.
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