Celluloid was invented in the 1860s – primarily to replace ivory. It was used extensively for jewellery in the Art Deco period. It was particularly suitable for making these smaller Art Deco hat pins. The majority were black and diamante but other colours were used. In present time people wear them anywhere – particularly in hats and berets of course, but they also look good on a jacket lapel etc. I always sell them with a hat pin end to prevent loss. They look great with a Deco outfit and are a low budget item that will really make a statement.