This sterling silver Irish Volunteer Button Tie Tack or Lapel Pin is exclusively commissioned by the National Musuem of Ireland from award-winning Dublin jeweller Declan Killen, and is hallmarked at Dublin Castle. The design is inspired by a button from the coat worn by Michael Collins that is in the National Museum of Ireland - Decorative Arts & History, Collins Barracks, Dublin. This beautifully crafted exclusive piece can be worn as a Tie Tack or Lapel Pin and can be securely fastened at the back with the press and turn fastener. Packaged in a National Museum of Ireland gift box. Diameter 1.7cm.