This 1965 definitive series from the Republic of Indonesia features President Sukarno in profile, rendered in bold monochrome tones of red, blue, green, violet, and brown. Each stamp bears the pentagonal “’65” year mark and the denomination in Sen, ranging from 20 to 100 Sen. Designed during a politically charged era, these stamps symbolize Indonesia’s national pride and independence under Sukarno’s leadership. They are notable for their clean design, strong color contrasts, and uniform portrait style, making them a favorite among collectors of postcolonial Asian issues.