Sheets of Singapore, 1991
| Issuer | Date | Desc | State | ||
| - | no image | Singapore | 4/24/1991 | Singapore '95 in 1991, sheet of 2 types | incomplete |
| - |  |
Singapore | 11/16/1991 | PHILANIPPON '91, sheet of 4 types | incomplete |
| Issuer | Date | Desc | State | ||
| - | no image | Singapore | 4/24/1991 | Singapore '95 in 1991, sheet of 2 types | incomplete |
| - | |
Singapore | 11/16/1991 | PHILANIPPON '91, sheet of 4 types | incomplete |