- 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
$ 68.81
$ 52.93
$ 85.83
$ 66.02
$ 130.00
$ 59.99
$ 21.99
$ 71.32
$ 54.86
$ 73.80
$ 56.77
$ 60.13
$ 46.25
$ 53.05
$ 40.81
$ 54.95
$ 84.64
$ 65.11
