Auction 333-341 Nigeria, Cameroon, Sudan & Worldwide Postal History - Day 4

1902: Unissued Stationery Envelope, King Edward VII 1 d. Photographic Essay, dated 21 March 1902, inscribed "B" and "DUPLICATE", mounted on card (89 x 114 mm.), minor tone spots evident. Rare; apart from the photographic essay two proofs are known.
Reference: Ince & Sacher, 1992, pg. 396; 'The Postal Stationery of Nigeria', by Peter Hørlyck, illustrated on pg. 384.
Provenance: Removed from the De La Rue Crown Agents Correspondence Books Volume 40, p.1, 11 November 1975; Robson Lowe, 21 December 1978, lot 1571; Robson Lowe, 10 June 1981, lot 393.