First Day Cover
首日封
Sobrescrito de 1.º Dia
China
Successful Launch of the Mars Probe Tianwen - 1 on China's First Mars Exploration Mission
Date of Issue : 26 September 2020
首日封
Sobrescrito de 1.º Dia
ChinaSuccessful Launch of the Mars Probe Tianwen - 1 on China's First Mars Exploration Mission
Date of Issue : 26 September 2020
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