Goldbach's Conjecture 80 分 — China, 1999
Goldbach's Conjecture (China, 1999), face value 80 分, “50th Anniv. of Chinese Academy of Science” series. Photo, catalogue value, details and photo…
- Series
- 50th Anniv. of Chinese Academy of Science
- Issue date
- 1999
- Face value
- 80 分
- Colors
- Multicolor
- Yvert
- CN 3752
- Michel
- CN 3091
- Stanley Gibbons
- CN 4448
- Scott
- CN 2982