Lot 11426 – Mauritius 1847 “Post Office” 2d, Sperati’s proof on cardboard in a rich and deep blue with very sharp impression

Sperati Forgeries: 1847 “Post Office” 2d, Sperati’s proof on cardboard in a rich and deep blue with very sharp impression. It is worthy of note that the 2d value has the tiny line in the bottom right corner, the secret marking that the Royal Philatelic Society put on the reproductions to tell them apart from the genuine stamps. An extremely rare and hitherto unrecorded proof, no more than seven proofs are known in a range of colours. This lot is housed in Sperati’s cardboard box of photographic paper from the Lumière brothers.