Coin Collecting Enamel Pin and Lapel Pin are a great way to show off your Love of Rare Coins. A lot of People Collect Pins Badges and Custom Pins. We have a great selection of Retro Pins, acrylic Pins and one piece enamel pin. Lapel Pins are very popular for Weddings and other events. Enamel Pin Sets are so fun to collect make sure to check out our whole store for your coin collector hobby. Approximately1/2" in diameter Authentic Italian Coins Hand Crafted Backing by Artisan in the USA Rhodium Plated Silver Butterfly Clasp Backing 1918-1920 years of mintage These have to be considered as emergency coins, since they were minted in years when nickel was very precious for military industries. To conserve the nickel, were used the previous 20 centesimi coins (km# 28) withdrawn from circulation as base metal to overstrike these new coins. For this reason many coins have signs of the design of the previous km# 28. The more these signs are clear and well defined the more valued is the coin.