Specimen 1891-1902 issue, the collection of Specimen overprints ex the Bradbury Wilkinson archive, comprising ½d., 1d. and 2½d. handstamped "SPECIMEN." (16.5 x 2mm.) in red; ½d., 2½d. and 6d. overprinted "SPECIMEN." (B2); ½d. (5), 1d. (6), 2d. (2), 2½d. (4, one Prussian blue), 4d. (2), 6d., 9d. (2) and 1/- (2) handstamped "SPECIMEN." (12.5 x 2mm.) in violet; 1d. (2), 4d. (rare) and 6d. with reversed watermark; each (less two) from the upper right corner of the sheet and unused or affixed to small pieces. A rare and exceptional shade reference

Details
Specimen 1891-1902 issue, the collection of Specimen overprints ex the Bradbury Wilkinson archive, comprising ½d., 1d. and 2½d. handstamped "SPECIMEN." (16.5 x 2mm.) in red; ½d., 2½d. and 6d. overprinted "SPECIMEN." (B2); ½d. (5), 1d. (6), 2d. (2), 2½d. (4, one Prussian blue), 4d. (2), 6d., 9d. (2) and 1/- (2) handstamped "SPECIMEN." (12.5 x 2mm.) in violet; 1d. (2), 4d. (rare) and 6d. with reversed watermark; each (less two) from the upper right corner of the sheet and unused or affixed to small pieces. A rare and exceptional shade reference