Inny Cards

This is a simple set of digit and symbol cards printed on cartridge paper.

One set is available, free of charge to anyone applying for it.

Digits clearly printed on cards, laid out on a table top
The basic tools for all arithmetic—the digits

The digit nine, printed on thick cartridge paer, held in the hand to show scale
A hand-held Inny Card, on thick cartridge paper

That sounds a good offer - it is. There is one snag. Applications require the applicant to send us a stamped addressed envelope so that the cards can be be posted. No record is kept of the transaction. You, or your details, will not be passed on or sold to anyone else. The whole matter is closed once we have inserted the cards and mailed-out your envelope.