£700 - £800
1877 6d Grey plate 1 colour trial, in a deeper colour than the issued stamp, imperforate pane of twenty with "TELEGRAPHS SIX PENCE." in the left margin, each handstamped diagonal "SPECIMEN" type 11, mint, lightly mounted on three stamps only, minor gum wrinkles and tiny thin between two stamps, a rare and attractive pane. S.G. £2,600+. Photo on Page 20.
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