Personal collection of vintage and modern Abacuses / Abaci.
24 columns / 2:5 ratio / Made out of wood […]
The Abacus – A Pocket Computer / Catalog Number 68-17463 […]
23 columns / Plastic / with blue bag / Import […]
The Fundamental Operations in Bead Arithmetic – How to use […]
Indian Slider Abacus / Designed & produced in India by […]
Vintage Abacus / 8 columns / Copper frame and beads […]
Teacher Abacus / 13 columns / Big version 72 x […]
Brand SHARP / ELSI MATE EL-428 / Produced 1981 in […]
Post stamp / Thohoyandou, South Africa / VENDA / 1991 […]
Post stamp / Ireland / 1988 / Abacus & Computer […]
Wooden Abacus / 1:5 ratio / 21 columns / ~1950s […]
Post stamp / 5 colors / Soroban 1:4 / The […]
