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Image Colnect-3045-315-Zu-Chongzhi-and-value-of-pi.jpg

Colnect-3045-315-Zu-Chongzhi-and-value-of-pi.jpg
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Type: stamp Issuer: Hong Kong Date: 2015 Denom: ?
Visibility: public Image owner: none

postage 12/8/2015 $2.90 multi issue=Scientists in Ancient China unwmk perf=13.5x13.25

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Source name: Colnect
File URL: http://i.colnect.net/images/b/3045/315/Zu-Chongzhi-and-value-of-pi.jpg

Uploaded June 17, 2016, 2:54 pm by Stan Shebs