Issued by Austria in 1973, this 2.50-schilling commemorative stamp honors the Austrian social insurance system (“Österreichischen Sozialversicherungsträger”). The engraved design depicts a classical allegorical figure supporting another person, symbolizing social protection, welfare, and public solidarity. The detailed line engraving reflects the high artistic standards typical of Austrian mid-20th-century stamp production. This issue is notable for its symbolic representation of social security institutions and remains an attractive thematic item for collectors of welfare, public service, and European commemorative stamps.