You are looking at a gorgeous silver plated tie tac tack pin with a safety chain, set with an authentic United States 1918 Mercury dime 90% silver 10 cent coin. The coin is average circulated. The pin is made of solid brass with silver plating, and about 0.84"(21.25mm) diameter. I only use these coins with readable dates, never try to clean them, and always keep their collectible and numismatic values. I hope you end up with one of these beautiful silver coin tie pin. This tie pin will be great for holiday gift, investment purpose or just adding to your collection. I will be happy to combine shipping for multiple items. Thanks,