old money (thing)

The money system for the United Kingdom prior to 1971, when it was decimalised and became New Money:

• Guinea
  
  21 Shillings
  1 Pound and 1 Shilling
  
  
• Gold sovereign (aka One Pound)
  
  4 crowns
  20 shillings
  240 pence
  
  
• Gold half-sovereign
  
  10 shillings
  120 pence
  
  
• Silver crown
  
  5 shillings
  60 pence
  
  
• Silver halfcrown
  
  2 shillings and 6 pence
  30 pence
  
  
• Silver shilling
  
  12 pence
  
  
• Silver sixpence
  
  6 pence
  
  
• Copper penny (Pence)
  
  2 half pennies
  4 farthings
  
  
• Copper halfpenny ('ha'penny')
  
  
• Copper farthing

The Empire resisted decimalisation for so long because they believed it would make the money system too complicated...