Christiaan Huygens
Grenada
2000. New millennium. People and events of 17th century (1650 - 1700)
| SG3931-47 | 17 x 50c | Huygens (3938) & others |
Netherlands
1928. Child welfare
| ScB36 | 12.5c + 3.5c | Huygens |
1988. 300th Anniversaries of England's revolution
| SG1534 | 65 cents | Huygens & Newton |
First day cover
Maxi card
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@ Hung