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Auction: 25017 - Stamps and Covers of Great Britain
Lot: 5132

(x) Great Britain
Line Engraved Proofs and Essays
"Rainbow" Trials
1d. deep blue, horizontal pair with sheet margin at left, on watermark small crown sideways, ungummed paper, both impressions cancelled by trial Maltese Cross cancellations in black and with c.11mm. razor cuts which are believed to relate to the abrading experiments reported on 17 September by Rowland Hill to Sir Francis Baring, and are known on other examples of this trial. Small scissor cuts at foot and negligible thin in lower left corner of the left hand impression, otherwise fine and an important rarity. Spec. DP20F(a), £20,000+. Photo.

literature:
Illustrated in "Rainbow Trials", David Rowse, Pg. 117, as part of a reconstruction from the author's collection. The right hand pair having been offered in 'Tes'.

Subject to 5% tax on Hammer Price in addition to 20% VAT on Buyer’s Premium.

Estimate
£5,000 to £8,000