| Issuer | Date | Desc | State | ||
| - | no image | Guinea | 1998 | empty sheet (#29699) | incomplete |
| - | no image | Guinea | 1/5/1998 | empty sheet (#29648) | incomplete |
| - | no image | Guinea | 2/3/1998 | empty sheet (#29649) | incomplete |
| - | no image | Guinea | 2/3/1998 | empty sheet (#29650) | incomplete |
| - | no image | Guinea | 2/3/1998 | empty sheet (#29651) | incomplete |
| - | no image | Guinea | 2/3/1998 | empty sheet (#29652) | incomplete |
| - | no image | Guinea | 2/3/1998 | empty sheet (#29653) | incomplete |
| - | no image | Guinea | 2/3/1998 | empty sheet (#29654) | incomplete |
| - | no image | Guinea | 2/23/1998 | empty sheet (#29655) | incomplete |
| - | no image | Guinea | 2/23/1998 | empty sheet (#29656) | incomplete |
| - | no image | Guinea | 2/25/1998 | empty sheet (#29657) | incomplete |
| - | no image | Guinea | 3/20/1998 | empty sheet (#29658) | incomplete |
| - | no image | Guinea | 3/20/1998 | empty sheet (#29659) | incomplete |
| - | no image | Guinea | 3/20/1998 | empty sheet (#29660) | incomplete |
| - | no image | Guinea | 3/20/1998 | empty sheet (#29661) | incomplete |
| - | no image | Guinea | 4/1/1998 | empty sheet (#29662) | incomplete |
| - | no image | Guinea | 4/1/1998 | empty sheet (#29663) | incomplete |
| - | no image | Guinea | 4/1/1998 | empty sheet (#29664) | incomplete |
| - | no image | Guinea | 4/1/1998 | empty sheet (#29665) | incomplete |
| - | no image | Guinea | 4/1/1998 | empty sheet (#29666) | incomplete |
| - | no image | Guinea | 4/1/1998 | empty sheet (#29667) | incomplete |
| - | no image | Guinea | 4/1/1998 | empty sheet (#29668) | incomplete |
| - | no image | Guinea | 4/30/1998 | empty sheet (#29669) | incomplete |
| - | no image | Guinea | 5/7/1998 | empty sheet (#29670) | incomplete |
| - | no image | Guinea | 5/7/1998 | empty sheet (#29671) | incomplete |
| - | no image | Guinea | 5/7/1998 | empty sheet (#29672) | incomplete |
| - | no image | Guinea | 5/7/1998 | empty sheet (#29673) | incomplete |
| - | no image | Guinea | 5/7/1998 | empty sheet (#29674) | incomplete |
| - | no image | Guinea | 5/7/1998 | empty sheet (#29675) | incomplete |
| - | no image | Guinea | 5/7/1998 | empty sheet (#29676) | incomplete |
| - | no image | Guinea | 5/18/1998 | empty sheet (#29677) | incomplete |
| - | no image | Guinea | 5/18/1998 | empty sheet (#29678) | incomplete |
| - | no image | Guinea | 5/18/1998 | empty sheet (#29679) | incomplete |
| - | no image | Guinea | 5/18/1998 | empty sheet (#29680) | incomplete |
| - | no image | Guinea | 5/18/1998 | empty sheet (#29681) | incomplete |
| - | no image | Guinea | 6/30/1998 | empty sheet (#29682) | incomplete |
| - | no image | Guinea | 7/15/1998 | empty sheet (#29683) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29684) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29685) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29686) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29687) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29688) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29689) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29690) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29691) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29692) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29693) | incomplete |
| - | no image | Guinea | 7/30/1998 | empty sheet (#29694) | incomplete |
| - | no image | Guinea | 8/10/1998 | empty sheet (#29695) | incomplete |
| - | no image | Guinea | 8/20/1998 | empty sheet (#29696) | incomplete |
| - | no image | Guinea | 8/20/1998 | empty sheet (#29697) | incomplete |
| - | no image | Guinea | 8/20/1998 | empty sheet (#29698) | incomplete |
| - | no image | Guinea | 8/20/1998 | empty sheet (#29700) | incomplete |
| - | no image | Guinea | 8/20/1998 | empty sheet (#29701) | incomplete |
| - | no image | Guinea | 8/21/1998 | empty sheet (#29702) | incomplete |
| - | no image | Guinea | 8/21/1998 | empty sheet (#29703) | incomplete |
| - | no image | Guinea | 8/21/1998 | empty sheet (#29704) | incomplete |
| - | no image | Guinea | 8/21/1998 | empty sheet (#29705) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29706) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29707) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29708) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29709) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29710) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29711) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29712) | incomplete |
| - | no image | Guinea | 9/8/1998 | empty sheet (#29713) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29714) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29715) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29716) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29717) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29718) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29719) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29720) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29721) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29722) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29723) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29724) | incomplete |
| - | no image | Guinea | 9/28/1998 | empty sheet (#29725) | incomplete |
| - | no image | Guinea | 10/8/1998 | empty sheet (#29726) | incomplete |
| - | no image | Guinea | 10/30/1998 | Seaplanes 1998, sheet of 8 types | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29728) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29729) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29730) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29731) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29732) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29733) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29734) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29735) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29736) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29737) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29738) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29739) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29740) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29741) | incomplete |
| - | no image | Guinea | 10/30/1998 | empty sheet (#29742) | incomplete |
| - | no image | Guinea | 11/10/1998 | empty sheet (#29743) | incomplete |
| - | no image | Guinea | 11/10/1998 | empty sheet (#29744) | incomplete |
| - | no image | Guinea | 11/10/1998 | empty sheet (#29745) | incomplete |
| - | no image | Guinea | 11/10/1998 | empty sheet (#29746) | incomplete |
| - | no image | Guinea | 11/15/1998 | empty sheet (#29747) | incomplete |