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

1927: Stationery Envelope, 1 d. red, final colour Proof, complete envelope in the issused colour marked "appd for colour", initialled and dated "29/8/27". Tone spots, otherwise fine and scarce. Sold with an unsed file copy of the same envelope (has pin holes from being affixed to file).
Reference: The Postal Stationery of Nigeria, by Peter Hørlyck, illustrated pg. 388.
Provenance: Robson Lowe, 21 December 1978, lot 1323 (contained the proof of the 1d & 2d).