Image Colnect-3045-314-Zhang-Heng-and-seismoscope.jpg
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Type: stamp Issuer: Hong Kong Date: 2015 Denom: ?
Visibility: public Image owner: none postage 12/8/2015 $1.70 multi issue=Scientists in Ancient China unwmk perf=13.5x13.25 Crops No visible images cropped from this one. Measurements Resolution is unknown. Source Source name: Colnect File URL: http://i.colnect.net/images/b/3045/314/Zhang-Heng-and-seismoscope.jpg Uploaded June 17, 2016, 2:54 pm by Stan Shebs |
