unused Block Larger Than four 1892 overprinted "Postage Due" on watermarked 2c. brown pane of fifty (10x5), only first three vertical rows and top stamp in fourth vertical row with overprints leaving thirty-four stamps without overprint thereby resulting in five pairs variety with one stamp with overprint omitted. Fine, backing paper adheres to reverse. A remarkable piece. L. D7c, S.G. D133c