Exactus Business Machines
"Addiator"-type Sterling currency calculator, with capacity of £99,999 19s 11 d.
178 x 121 mm. / 7 x 4.75".
Made in England by Exactus Business Machines, 2/3Victoria Chambers, Luke Street, London EC2.
Probably made in 1950s to 1960s.
The Exactus Mini-Add is unusual in that a flap is flipped across to change from addition mode to subtraction mode.
Exactus Mini-Add in wallet with box and instructions.
© Text & photographs copyright Nigel Tout 2000-2017 except where noted otherwise.