In the early twentieth century companies flocked to Belvedere. These included British Plaster Board, which produced gypsum, Royal Doulton, makers of ceramics and Plasternol, manufacturers of synthetic resins. This concentration of new industries in North West Kent was such that in 1931 Frank Clarke referred to it as "the Birmingham of the south".
You are looking for a colour coordinated pot attached with velcro around head height.