1876 1S PL.13 (SG148/150) IMPERFORATE PLATE PROOF IN BLACK. A good imperforate plate proof in black 1876 1s pl.13 (SG148/150) on white wove paper lettered RJ, thin spot on reverse at upper right but fine margins and the first example we have seen. Apparently all recorded examples are from a block of 12 lettered RI-TL with SK-TL in the Royal Collection. (Ref 138246).
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