Bonzo the Dog cartoon character badge 1924 silver & enamel book mark

A rare original circa 1924 period English Made 'Bonzo the Dog silver and enamel book mark depicting the cartoon character with hangdog expression; the front impressed with Birmingham silver hallmarks for 1924 and 'Rd 706159' a registration, design and patent number for the year 1924. Very good condition, no enamel loss. Height approx 74mm.