Denominations of British postal orders

British postal orders, payable at all the principal Post Offices in this country, in the United Kingdom and in the countries indicated in the Post Office Guide issued by Her Majesty’s Postmaster General shall be issued in this country in the denomination of five pence and thereafter in other eight different denominations of higher values up to twenty-five pence, with successive differential of two and a half pence between any two denominations, and in the denomination of thirty pence and thereafter in other thirteen denominations of higher values up to one hundred pence, that is £1, with successive differential of five pence between any two denominations, and in other denominations of multiple of £1 up to £10.