| Name | Issues/Designs | |||
| King Ferdinand birth | 1452 | — | - ... 500th syns. Ferdinand the Catholic birth | |
| Isabella I birth
(syn. of Queen Isabella birth) |
1453 | — | - Isabella I 500th | |
| UPU founding
(syn. of Universal Postal Union founding) |
1874 | — | - UPU 75th |