From 1926 onwards, the fascias of Post Office kiosks were emblazoned with a prominent crown, representing the British government (of which the Post Office was an agency). The design was initially the "Tudor Crown", then in widespread use in government service. The same crown was used in all parts of the United Kingdom and British Empire. On the K2, the design was pierced through the ironwork, and acted as a ventilation hole. On the K6, a separate ventilation slot was provided, and the crown was embossed in bas-relief.