Could be Guineas. One Guinea = 21 shillings, with One Pound = 20 shillings. So One Guinea = 1 1/20 Pounds! No wonder we went for decimalisation (before I can remember!).

Now you have to discover the 26th letter of the alphabet

Also the US and Britain has to decide just how many syllables are in word Jaguar and why the Brits add an extra i to a perfectly good word like aluminum or an extra u to a perfectly good word like color.

(I'm only funnin' you Jason)