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1929（17.1） Registered insured mail cover from Harbin to Czechoslovakia，obverse bearing Reaper 6c“Limited for Use in Ki-Hei”，10c，30c pair，totally 86c，reverse with（31.1） Prague arrival dater，clear markings，reverse with registration and insurance slips，reverse with seal wax and chaters of insurance，nice condition. Highly scarce international registered mail sent insured.
