Very large vintage button, domed shape with shiny black striped faux tortoiseshell background, embellished with a fan shape in iridescent swirly colours. Matt grey back with swaged in metal loop shank. Some kind of early plastic - looks like casein from the back with a shiny transfer decoration. Unusual collectible. Slight damage to the fan, where decoration is flaking off (top right), priced accordingly

Size approx 3” (7.4 cm)