unused Block Larger Than four 1 quattrino black on grey, an outstanding and probably unique mint block of twelve (4 x 3) showing the complete crown of the watermark, very fresh with margins practically clear on all sides and virtually full original, crackly gum; two negligible splits at foot are mentioned for accuracy. A splendid and extremely fine showpiece. Enzo Diena certificate (1988) stating that this is the largest known block. Signed Alberto Diena, F. Grioni, E. Asinelli. Sassone 1. Photo
unused Block Larger Than four 1 quattrino black on grey, an outstanding and probably unique mint block of twelve (4 x 3) showing the complete crown of the watermark, very fresh with margins practically clear on all sides and virtually full original, crackly gum; two negligible splits at foot are mentioned for accuracy. A splendid and extremely fine showpiece. Enzo Diena certificate (1988) stating that this is the largest known block. Signed Alberto Diena, F. Grioni, E. Asinelli. Sassone 1. Photo
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
