Zhang Heng and seismoscope 1.70 HK$ — Hong-Kong, 2015
Zhang Heng and seismoscope (Hong-Kong, 2015), face value 1.70 HK$, “Scientists in Ancient China” series. Photo, catalogue value, details and photo…
- Series
- Scientists in Ancient China
- Issue date
- 2015
- Face value
- 1.70 HK$
- Colors
- Multicolor
- Yvert
- HK 1812
- Michel
- HK 2010
- Stanley Gibbons
- HK 1985
- Scott
- HK 1751