For those too young to know about money before Decimalisation
d stands for penny or pence
1 farthing
1 halfpenny = 2 farthings
1d penny = 2 halfpenny
3d pennies (known as thripny bit or thripny joey) = 3pennies
6d pennies (known as a tanner) = 6 pennies
12d pennies ( known as a shilling or a bob) = 12 pennies
24d pennies (known as 2 bob or a florin) = 24 pennies
30d pennies (known as half a crown or a half dollar) = 30 pennies
120d pennies (known as 10 bob note) = 120 pennies
240d pennies (known as a pound note} = 240 pennies
other notes same as today
Anyone interested and I'll try to send photos of the coins and noes measured against a ruler
Going by the size of 1d ( one penny) which was about 2 inches in diameter and half crown slightly larger it is no wonder trousers and jackets always got holes in the pockets