Cuba Butterfly Essai Tri-Metallaics
They came in 2 varieties, plain or milled edges
Images from Paul Davis of Arctic Coins

Anartia Amathea Butterfly with common reverse

Cuba Phoebis Avellaneda Butterfly

Cuba Psedolycaena Marsyas Butterfly

Cuba Danaus Plexippus Butterfly

Cuba Hypolimnas Misippus Butterfly

Cuba Spiroeta Stelenes Butterfly

Cuba 1995 10 Pesos Essai
Image from Paul Davis