For those of you too young to remember the peculiar monetry system pre decimalization, here goes.
The pound sterling was worth 20 shillings.
The shilling was worth 12 pence, or pennies.
The penny was further divided into half-pence and farthings.
Currency could be a Ten Pound Note, a Five Pound Note, a One Pound Note and even a Ten Shilling Note.
Coins were a Crown (Five Shillings), Half Crown (Two Shillings and Sixpence), Shilling (Twelve Pence) Sixpence(Just that), Threepenny Bit, and the divisions of a penny noted above.
The silver coins above a penny were of different sizes but the penny and derivatives were of copper. The penny was as big as a manhole cover.
When calculating percentage discounts on a figure such as L2.15.6 ( Thats two pounds fifteen shillings and sixpence), it got quite entertaining