Sheets of Tanzania, 1991 incomplete
| Issuer | Date | Desc | State | ||
| - | no image | Tanzania | 1991 | empty sheet (#57293) | incomplete |
| - |  |
Tanzania | 1/10/1991 | International Literacy Year, empty sheet (#15121) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57264) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57265) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57266) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57267) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57268) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57269) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57270) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57271) | incomplete |
| - | no image | Tanzania | 1/10/1991 | empty sheet (#57272) | incomplete |
| - | no image | Tanzania | 1/18/1991 | empty sheet (#57273) | incomplete |
| - | no image | Tanzania | 1/18/1991 | empty sheet (#57274) | incomplete |
| - | no image | Tanzania | 2/20/1991 | empty sheet (#57275) | incomplete |
| - | no image | Tanzania | 2/20/1991 | empty sheet (#57276) | incomplete |
| - | no image | Tanzania | 3/15/1991 | empty sheet (#57277) | incomplete |
| - | no image | Tanzania | 3/28/1991 | empty sheet (#57278) | incomplete |
| - | no image | Tanzania | 4/29/1991 | empty sheet (#57279) | incomplete |
| - | no image | Tanzania | 4/29/1991 | empty sheet (#57280) | incomplete |
| - | no image | Tanzania | 6/7/1991 | empty sheet (#57281) | incomplete |
| - | no image | Tanzania | 8/15/1991 | PHILANIPPON '91, empty sheet (#57283) | incomplete |
| - | no image | Tanzania | 8/15/1991 | empty sheet (#57284) | incomplete |
| - | no image | Tanzania | 8/15/1991 | empty sheet (#57285) | incomplete |
| - | no image | Tanzania | 8/15/1991 | empty sheet (#57286) | incomplete |
| - | no image | Tanzania | 8/22/1991 | empty sheet (#57287) | incomplete |
| - | no image | Tanzania | 8/22/1991 | empty sheet (#57288) | incomplete |
| - | no image | Tanzania | 8/28/1991 | empty sheet (#57289) | incomplete |
| - | no image | Tanzania | 8/28/1991 | empty sheet (#57290) | incomplete |
| - | no image | Tanzania | 8/28/1991 | empty sheet (#57291) | incomplete |
| - | no image | Tanzania | 8/28/1991 | empty sheet (#57292) | incomplete |
| - | no image | Tanzania | 9/16/1991 | empty sheet (#57294) | incomplete |
| - | no image | Tanzania | 9/20/1991 | empty sheet (#57295) | incomplete |
| - | no image | Tanzania | 10/28/1991 | African Elephant, empty sheet (#57296) | incomplete |
| - | no image | Tanzania | 10/28/1991 | Aquarium Fish, sheet of 16 types | incomplete |
| - | no image | Tanzania | 10/28/1991 | Horses, sheet of 16 types | incomplete |
| - | no image | Tanzania | 10/28/1991 | Cats, sheet of 16 types | incomplete |
| - | no image | Tanzania | 11/20/1991 | empty sheet (#57300) | incomplete |
| - | no image | Tanzania | 11/20/1991 | empty sheet (#57301) | incomplete |
| - |  |
Tanzania | 12/10/1991 | Locomotives and Railcars, sheet of 1 type | incomplete |
| - | no image | Tanzania | 12/24/1991 | empty sheet (#57302) | incomplete |
| - | no image | Tanzania | 12/24/1991 | empty sheet (#57303) | incomplete |