India, 1941 Air Mail Letter Sheets used in Sudan, two from correspondence to Great Britain; one franked with 1937, 9p green + 1941, 2a scarlet tied by "F.P.O., No. 12, 29 Dec 41" cds, other franked with 1937, 3p slate + 2a6p purple tied by "M.P.O., No. 12, 28 Aug 41" cds, both with boxed censor, Very Fine. Estimate  $200 - 300. $0 (Image)