unused Block Larger Than four 1d. vermilion, comb perf., a block of twelve (6 x 2) being the complete lower two rows of the sheet with full sheet margins, variety overprint double and with additional part impression of the overprint appearing vertically on reverse of margin due to a paper fold; unused and somewhat discoloured though, despite the condition, arguably the most important War Stamp issue multiple. S.G. 71ca, £19,200+++. Photo