Chang Heng (A.D. 78-139), astronomer 8 分 — China, 1955
Chang Heng (A.D. 78-139), astronomer (China, 1955), face value 8 分, “Scientists of Ancient China (1st Set)” series. Photo, catalogue value, details and…
- Series
- Scientists of Ancient China (1st Set)
- Issue date
- 1955
- Face value
- 8 分
- Colors
- Olive brown
- Print run
- 6,000,000