Sheets of Canada, 1991
| Issuer | Date | Desc | State | ||
| - |  |
Canada | 1991 | Queens University 150th, sheet of 1 type | all added |
| - |  |
Canada | 1991 | sheet of 10, 5 types | |
| - |  |
Canada | 1991 | sheet of 10, 5 types | all added |
| - |  |
Canada | 1991 | empty sheet (#788) | incomplete |
| - |  |
Canada | 1/11/1991 | empty sheet (#54873) | incomplete |
| - |  |
Canada | 10/23/1991 | empty sheet (#54874) | incomplete |
| - |  |
Canada | 10/23/1991 | empty sheet (#54875) | incomplete |
| - |  |
Canada | 10/23/1991 | empty sheet (#54876) | incomplete |
| - |  |
Canada | 10/23/1991 | empty sheet (#54877) | incomplete |
| - |  |
Canada | 10/25/1991 | empty sheet (#54871) | incomplete |
| - |  |
Canada | 12/27/1991 | empty sheet (#54872) | incomplete |
| - |  |
Canada | 12/27/1991 | empty sheet (#54878) | incomplete |
| - |  |
Canada | 12/27/1991 | empty sheet (#54879) | incomplete |