Home / Stamps / AUSTRALIA / POSTAL HISTORY / FDCs - DECIMAL / AUSTRALIA – 1967 5th ‘WORLD CONGRESS’ Sigma First Day Cover [B5440] AUSTRALIA – 1967 5th ‘WORLD CONGRESS’ Sigma First Day Cover [B5440]Description Fine Condition. Price(AUST) $10.00 1 in stock Buy with – OR – Add to cart SKU: B5440 Categories: AUSTRALIA, FDCs - DECIMAL, POSTAL HISTORY, SIGMA FIRST DAY COVERS, Stamps