This is an authentic Chinese abacus that was used in the early 20th century. The Abacus being an ingenious calculator has been used in China for over a thousand years. Its accuracy and speed remains extraordinary till this day of age. This special piece has a tenon-mortise wood frame reinforced by metal brackets, hand-cut solid wood beads, and bamboo and metal bars. The beads are substantial but perfectly smooth due to frequent use and fast movements. When in use, the beads make a wonderful pleasant sound that symbolizes prosperity. This is a fully functional piece that was actually used, not a decorative export item. The abacus is a scientific relic that represents a piece of Chinese history and the intelligence of its people. In remarkable condition.