Colibri 18 KT. Gold Electroplate Trout Fishing Tie Tack Hat/Lapel Pin Back The Colibri 18 KT. Gold Electroplate Tie Tack / Lapel Pin is a collectible, vintage men's accessory manufactured in the United States. These pieces feature a thick 18-karat gold layer electroplated over a strong base metal and include a standard clutch back (pin back)