Sheets of United States, 1966
| Issuer | Date | Desc | State | ||
| - |  |
United States | 1966 | empty sheet (#20) | incomplete |
| - |  |
United States | 1966 | empty sheet (#21) | incomplete |
| - |  |
United States | 1966 | empty sheet (#22) | incomplete |
| - |  |
United States | 1966 | empty sheet (#23) | incomplete |
| - |  |
United States | 5/23/1966 | sheet of 1 type |