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Product description
Chinese Huanghuali wooden Suanpan counting frame with beads | Abacus, late 19th century to early 20th. The suanpan is a 2:5 abacus: two heaven beads and five earth beads. An abacus (pl.: abaci or abacuses), also called a counting frame, is a hand-operated calculating tool which was used from ancient times in the ancient Near East, Europe, China, and Russia, until the adoption of the Arabic numeral system.[1] An abacus consists of a two-dimensional array of slidable beads (or similar objects). In their earliest designs, the beads could be loose on a flat surface or sliding in grooves. Later the beads were made to slide on rods and built into a frame, allowing faster manipulation. Each rod typically represents one digit of a multi-digit number laid out using a positional numeral system such as base ten (though some cultures used different numerical bases). Roman and East Asian abacuses use a system resembling bi-quinary coded decimal, with a top deck (containing one or two beads) representing fives and a bottom deck (containing four or five beads) representing ones. Natural numbers are normally used, but some allow simple fractional components (e.g. 1⁄2, 1⁄4, and 1⁄12 in Roman abacus), and a decimal point can be imagined for fixed-point arithmetic. Good vintage condition, some signs of wear consistent with age and use.
Good vintage condition, some signs of wear consistent with age and use.
Good vintage condition, some signs of wear consistent with age and use.
Specifications
ConditionGoodColorsBrownMaterialWoodNumber of items1StyleVintageHeight18 cmWidth43 cmDepth3 cmSigns of usageDiscoloring, Scratches