"Father gave me an extra half-crown for every afternoon I worked there"
An 1885 half-crown
Creative Commons Attribution Share AlikeAn 1885 half-crown - Credit: Jerry "Woody", Flickr

crown was worth five shillings in Britain prior to decimalisation (25p in modern terms).

A half-crown could, therefore, be described as two shillings and sixpence, or simply as two and six.