Tasmania 1870 Sideface 4d Imperforate Plate Proof in issued Blue, on Watermarked Crown CC Paper: VERY rare, have never had one of these before. The COARSE later Colony reprints on thin cardboard are often encountered, but I have never had the watermarked normal paper proof. Believed to be pulled by Da La Rue in London, and the razor sharp impression supports that.
NO stamp was ever issued here with this Crown CC watermark, from any Colony! I am advised only a few of this proof are recorded, and one was invoiced for £500-$A1,000 at a UK auction.https://www.stampboards.com/viewtopic.php?f=27&t=90985