Featured Listings in Commemoratives > 1929 Postal Union Congress. SG 434-38 > ½d green
1929 ½d green. WATERMARK INVERTED. SG 434Wi. Scarce ex sheet block.
Unmounted mint lower marginal block iof four WATERMARK INVERTED. Scarcer than booklet source inverted watermark and distinguished by presence of sheet margin.
£120.00
IanLasokSmith