Suanpan Abacus #7130

The suanpan is an abacus of Chinese origin.

There are two types of beads on the suanpan, those in the lower deck, below the separator beam, and those in the upper deck above it. The ones in the lower deck are sometimes called earth beads or water beads, and carry a value of 1 in their column. The ones in the upper deck are sometimes called heaven beads and carry a value of 5 in their column. 

Both these were found in an antique shop in Indonesia. There are 2 available. 

Measures approx: 44cm x 18cm x 3cm