Abacus is an old fashioned 'calculator' that uses colored wooden balls to count the amounts. These abacus clocks were inspired by this ancient device.
 
- Raw material: 15mm birch plywood board (birch) and 12 colored wooden balls (beech)
 
- Manufacturing process: the 13 concentric rings that compose the dial of these abacus clocks are laser cut out of the plywood board. After polishing the rings are fixed together with wooden rods that also hold the colored balls. The balls are painted 12 glossy shades of the rainbow, while the rings remain natural (light brown).
 
- Colors: 
rings: natural wood tone
balls: 12 colors of the rainbow (multicolor)
 
- The movement: is silent
 
- Battery requirement: 1 pc AA (not included in the package).
 
- Hands: plastic - black.
 
- Dimensions:
diameter: 59cm / 23.5 in
depth: 3,3cm / 1.25 in
weight: 2kg / 4.2 lbs
 
- Production: 2-4 days
 
- Shipping: ~1 week

Please note: although these abacus clocks ship for free certain countries above certain product value may still charge customs duty and/or import tax. In this case this fee is collected by the carrier.
 
Find other models similar to these abacus clocks from ardeola here.