Here is what one may assume is a proof ( or specimen ) stamp issued over 15 years ago featuring Minnie Mouse reading the 'terms of baseball' while the 'manager' Donald Duck looks over in frustration.

This $2 value is of the island nation of Grenada

( which was liberated from Cuba just 3 years before these were issued ).
Each piece bears a Walt Disney Productions copyright.

As there are no perforations, or gum and they are printed on thick stock,
they are certainly not postage stamps,
although there are stamps with this exact same design.