Pythagorean theorem 30 c — Nicaragua, 1971
Pythagorean theorem (Nicaragua, 1971), face value 30 c, “Mathematics” series. Photo, catalogue value, details and photo identification.
- Series
- Mathematics
- Issue date
- 1971
- Face value
- 30 c
- Colors
- Multicolor
- Yvert
- NI PA716
- Michel
- NI 1619
- Stanley Gibbons
- NI 1769
- Scott
- NI C762