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

1950: Registered Envelope, 3 d. blue, size F, imprint "THOMAS DE LA RUE & COMPANY, LIMITED.", unused, strong colour, fresh example, very fine, rare; one of two recorded unused.
Note: All King George VI registered envelopes, except the 1937 size G, are scarce in mint condition.
Reference: The Postal Stationery of Nigeria, by Peter Hørlyck, illustrated on pg. 103.