27th October 2022 | administrator | Leave a comment The modernist Type K box was designed by Tony Gibbs and was intended to be the pillar box of the future. A cylindrical design without a separate cap, installation began in 1980. Five different foundries cast versions of the Type K. In service the hinges of the door proved prone to failure. No more were produced after 2001. And the “pillar box of the future” ceased to be made.