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

1927: Stationery Envelope, 1½ d. orange, Die Proof, on laid paper, size 114 x 62 mm., dated "9.4.31" and inscribed "Nigeria Req 4973" and "Die appd.", initialled and dated "15/4/31", scarce.
Reference: The Postal Stationery of Nigeria, by Peter Hørlyck, illustrated pg. 389.
Provenance: Robson Lowe, 21 December 1978, lot 1325; Cavendish, 20 June 2001, lot 470.