细节
cover 1920 (26 Aug. and 19 Nov.) XU5 registered to London and to Switzerland respectively, the first bearing 1½d. on 2½d. horizontal pair and 1908-21 ½d. single, the latter bearing 1½d. on 2½d. horizontal strip of four, the right stamp showing short fraction bar; one or two small faults. Scarce. S.G. 47a, 60, 60a