Issued by Yugoslavia in 1973, this commemorative 0.80 dinar stamp honors the 100th anniversary of the Metric System (1873–1973). The bold design features a stylized letter “M” formed by a folded measuring rule, symbolizing precision and standardization. The right panel bears the anniversary laurel wreath enclosing the number “100,” alongside inscriptions in multiple Yugoslav languages: “METARSKI SISTEM / METRIČKI SISTEM / METRSKI SISTEM.” Designed by A. Milenković, the issue reflects the nation’s scientific progress and its commitment to international measurement standards.