- An Instrument For Performing Calculations.
- Calculations Performed By Sliding Counters Along Rods.
- Its Primary Purpose Is To Teach Arithmetic To Children.
- Two Colour Unit.
- 120 Beads.
$ 54.00
$ 0.00
$ 54.00
$ 0.00
$ 88.04
$ 67.72
$ 74.99
$ 44.99
$ 90.47
$ 69.59
$ 89.95
$ 76.00
$ 75.00
$ 52.50
$ 87.99
$ 89.90
$ 69.15
$ 99.95
$ 78.38
$ 60.29
$ 45.99