Ray's beautiful new smaller soroban measures as follows .......140mm x 45mm x 10mm it weighs 147g. The bars for the beads are 2mm and the cross bars are 5mm the heaven beads are stainless steel and the earth beads are brass.
 |
For perspective the smaller soroban is shown here with it's larger brother the Mark2.
|
|
Photos by Ray McCulloch Prescot
ABACUS: MYSTERY OF THE BEAD
The Bead Unbaffled - An Abacus Manual
Back to Abacus Photo Gallery