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Lot# 4412 - Auction 274-283

  • Lot# : 4412 Great Britain

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    1857/58: 1 s. green on thin blued (azure) paper, a horizontal pair used with 1858 1d. rose-red, plate 60, letterd CB and 2d. blue plate 5, EI, cancelled with '50' London Chief Office barred numeral on 16 April 1858 cover endorsed "via Grey Town" to the Postmaster General Francisco Echeverria in San Jose, Costa Rica with ms. docketing 'Recibo Mayo 23/58' on reverse. Despite the rare destination, the 1 s. on azure paper is a great rarity, as only a very small print run of the 1s. was carried out on the azure paper. The Karl Louis Card Index records one similar cover with the same franking from the same correspondence and just eight more covers, threreof six single frankings, a pair (N.P.M.London). Typical tropicalisation slightly toning adhesives and envelope (cleaned staining) due to destination, but a great rarity in regard of Postal History (destination) and Traditional Philately of the Surface Printed Issues (Azure Paper). Cert. RPSL (2020) Gi = £ 4'000+ for two single 1s. off cover.rnRemarks: Intensive research has been undertaken with regard to the chemical paper ingredients responsible for the blueing of the 1s. azure paper by X-ray flourescence spectroscopy by comparing the blueing of 4d. and 6d. adhesives from the 1855/58 issue with the 1s. The results show very similar diagram results of the chemical contents of the blued paper (copies of the diagrams attached with the lot).  rn 
    Starting bid : 1,000 CHF
    Hammer price : 1,800 CHF