Mathematical Clock, and Theory of Functions Diagram 50 h — Tchécoslovaquie, 1987
Mathematical Clock, and Theory of Functions Diagram (Tchécoslovaquie, 1987), valeur faciale 50 h, série « 125th Anniv. of Union of Czech Mathematicians and…
- Série
- 125th Anniv. of Union of Czech Mathematicians and Physicists
- Date d’émission
- 1987
- Valeur faciale
- 50 h
- Couleurs
- Polychrome
- Tirage
- 13,280,000