Stamps printed in excessive quantities
According to an article in the Philatelic Webmaster Organization, some companies that have printed stamps on behalf of poor countries (especially in Africa) are printed in excessive quantities aimed at collecting.
Stamps are only apparently approved by local postal administrations,
The article mentions in particular
many stamps and leaflets related to minerals, from countries such as:
Chad, Comoros, Mali, Niger, Congo ,
Burundi, Guinea Rep., Guiné Bissau Rep.,
Solomon Is., S.Tome & Prince, Togolaise Rep.....
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Black number = Scott catalog
Blue or red number = Yvert et Tellier catalog
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Scientists of Geosciences
| Image | Country | Year | Subject | Yvert | Set |
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Meteorites
| Image | Country | Year | Subject | Yvert | Set |
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Gems and Jewels FDC and Postcards
| NEW |  |
Garnet |
Mongolia 2023 Precious stones |
Minerals, FDC and Postcards
2024 - n-c. Y&T - 1070 |
NEW | 2024 - n-c. Y&T - 1071 |
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2024 - n-c. Y&T - 1102 |
NEW | 2024 - n-c. Y&T - 1103 |
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