Sheets of Spain, 1991
| Issuer | Date | Desc | State | ||
| - |  |
Spain | 4/19/1991 | GRANADA '92, sheet of 1 type | incomplete |
| - |  |
Spain | 5/3/1991 | National Cultural Heritage 1991, sheet of 4 types | incomplete |
| - |  |
Spain | 10/15/1991 | empty sheet (#9827) | incomplete |
| - |  |
Spain | 12/12/1991 | EXFILNA '91, sheet of 1 type | all added |