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Source:
Colnect
Issued by:
China, ROC
Function:
postage
Date:
4/22
/
1988
Denom:
$16
Color:
multicolored
Design type:
Science and Technology
Design:
Materials research
Watermark:
Perf:
Catalog value:
Prev:
$12 d=Electro-optics
Next:
$16.50 d=microscope & tin can
External links:
Colnect 435201..ublic_of_China
