1957 (27 Jul) Swiss Consulate Shanghai large diplomatic cover to Swiss Embassy Peking, f.w. C and R series issue x9, tied by Shanghai cds.
1957 (27 Jul) Swiss Consulate Shanghai large diplomatic cover to Swiss Embassy Peking, f.w. C and R series issue x9, tied by Shanghai cds. Applied with several strikes of Swiss Consulate Shanghai seal. Arrived Peking (9 Jul). Scarce domestic example of diplomatic mail in China. x91957.7.27 瑞士駐滬大使館大型公文封寄瑞士駐北京領事館，貼紀票及普票x9，銷上海日戳。另鈐多處瑞士駐滬大使圓戳。7.9抵北京。少見之外國外交郵件國內互寄。
