| Issuer | Date | Desc | State | ||
| - | no image | Austria | 3/3/2018 | empty sheet (#64488) | incomplete |
| - | no image | Austria | 5/18/2018 | empty sheet (#64489) | incomplete |
| - | no image | Austria | 8/24/2018 | sheet of 1 type | |
| - | no image | Austria | 8/24/2018 | sheet of 4 types | |
| - | no image | Austria | 10/6/2018 | 100 years of Airmail, sheet of 1 type |