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| Endangered Species (New York) |
| First Day Cover single stamp |
| ›United Nations |
| Endangered Species (Geneva) |
| First Day Cover single stamp |
| ›United Nations |
| Climate Change (New York) |
| First Day Cover single stamp |
| ›United Nations |
| Climate Change (Geneva) |
| First Day Cover single stamp |
| ›United Nations |
| Climate Change (Vienna) |
| First Day Cover single stamp |
| ›United Nations |
WOPA+ recommended stamp issues
| FDC Year Pack |
| Issued: 01.11.2018 |
| ›Iceland |
| Personalities |
| Issued: 05.01.2022 |
| ›Romania |
| Ludwig Wittgenstein 1889 - 1951 |
| Issued: 19.01.2022 |
| ›Austria |
| Year of the Tiger |
| Issued: 19.01.2022 |
| ›Guernsey |
| Icelandic Art X |
| Issued: 31.10.2019 |
| ›Iceland |
| FDC Year Pack |
| Issued: 31.10.2019 |
| ›Iceland |