This striking Greek 500 drachmai stamp features the radiant head of Helios, inspired by classical iconography associated with the ancient Dodecanese. The inscription KOINON NHΣIΩTΩN (“League of the Islanders”) reflects its use for the Island Federation fund—an early 20th-century Greek fiscal/postal-tax issue rather than regular postage. Printed in vivid carmine-red, the design shows fine line engraving and a bold sunburst motif, giving it strong visual appeal for classical-thematic collectors. High-denomination values like this 500 drachmai are scarcer in genuinely used condition and remain sought after among specialists in Greek local and revenue issues.