"and though we play but half-crowns"
George IV crown (1821)
Creative Commons Attribution Share AlikeGeorge IV crown (1821) - Credit: Jerry "Woody"

 The half crown was a British coin in circulation between 1549 and 1970.

A crown was worth five shillings in pre-decimalisation currency. In today's money, a crown would be worth 25p, and a half crown 12.5p.