11020 | 1956（31.8） Airmail cover from Peking to Switzerland，bearing 13 stamps including S13 etc
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1956（31.8） Airmail cover from Peking to Switzerland，bearing 13 stamps including S13 etc，totally 70f，nice condition. Since August 31，1956，P.R. China international air rate became uniform all around the country with 30f postage，so this cover is the last day cover of P.R.C. regional air rate.
