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Source:
Colnect
Issued by:
China, PRC
Function:
postage
Date:
4/28
/
1988
Denom:
20f
Color:
multicolored
Design type:
Scientists (1988)
Design:
Wu Youxun
Watermark:
unwmk
Perf:
11x11.5
Catalog value:
Prev:
10f d=Zhu Kezhen
Next:
30f d=Hua Luogeng
External links:
Colnect 706208..oples_Republic
