This Belgian definitive stamp features a finely engraved left-facing profile of King Baudouin I, who reigned from 1951 to 1993. The minimalist design, printed in green, reflects the clean and modernist aesthetic characteristic of mid-20th-century Belgian issues. The dual inscriptions “BELGIË” and “BELGIQUE” denote the country’s bilingual heritage (Dutch and French). Issued as part of a long-running definitive series, it served for everyday postal use during the 1960s–1970s, symbolizing continuity and national unity under the monarchy.