Silver coin.

Part of Wave 4 (A New Hope: "Jabba's Palace").

From the manufacturer:

Articulated action figure has detailed styling and comes with an exclusive collector coin! Action figure comes with backpack, weapon and coin. Ages 4 and up.

Friend or Foe? In the Star Wars Holiday Special, Boba Fett helps Chewie find a cure for the sleeping sickness that has infected Han and Luke, but he also tells Darth Vader of the Rebels' location. The droids intercept his message and tell the Rebels, but Fett escapes, promising that they will meet again.