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MZO claimed 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.This vintage style abacus comes with a beautiful leather surface wooden case in ancient Chinese beauties design. A English instruction booklet for bead arithmetic is included.Size: L14´ x W6.5 x H2´
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