Auction 321 - 332 Europe & Overseas Great Britain & British Commonwealth - Day 3

Rhodesia 1929, Rhodesia Railway Strike: 2 d. yellow-brown, used on Rhodesian Congo Border Concession Ltd imprint envelope, from Ndola to Bulawayo, dated 15 February 1929, addressed to Duly & Co., carried by the Royal Air Force, during the Railway Strike on the copper belt,  with manuscript "R.A.F." in ink on reverse, a rare example, less than a dozen known.rnRef: "Mail flown during the Rhodesian Railway Strike of 1929" by John Berridge, Rhodesian Study Circle Journal, No. 217, December 2005, page 187-191; Illustrated in The Rhodesian Philatelist, January 2005, No. 24, page 399, mentioned page 394.