6 Shillings Postal Order

British postal orders of this period were printed by Bradbury, Wilkinson & Co. under contract to the Post Office — the same firm responsible for much of the era's Commonwealth stamp and banknote production. The 6 shilling denomination is a direct casualty of decimalisation: when the UK converted to decimal currency on 15 February 1971, all pre-decimal postal orders were withdrawn and could only be exchanged at post offices for a limited period before becoming void.

Surviving uncashed examples are more common than one might expect — many were simply forgotten in drawers and never redeemed. The watermark on this series runs across the full sheet width during manufacture rather than being note-specific, which distinguishes it from contemporary banknote security practice.