Shellubricate Shell Oil Company advertising badge circa 1920s

A scarce original circa 1920's 'Shellubricate promotional badge'; gilt brass example in the shape of a shell, inlaid with red and black enamel, the reverse impressed with maker's details 'Thomas Fattorini Limited Birmingham' and 'Reg 632818' a registered, design and patent date of 1914. Very good condition, complete with original buttonhole lapel fitting, enamel intact, very minor nick to title scroll. Height 18mm.