| Paper |
 P89
 |
| Date of use | 1765 - 1769 |
| Paper mill | Antonio Seguito, Lusetti, Toscolano |
| Commentary | P79 is a distinctive variant of P89. Whereas the letter A and the three crescents are identical, the papers differ in the form of the letters M and S and in the position of the letter S. In the sidemark of P79, the letter S – in P89 positioned right of the letter A – is mirrored and repositioned left of the letter A. The whole sheet appears thus as a vertically mirrored image of P89 with an interchanged letter sequence. In addition, in P79A the letter M is positioned differently and in P79B, the letter M is narrower than in P89. |
Watermark P89A
| Watermark | 3 crescents / M |
| Selenometrie in mm | xy: 16, xz: 78 |
| Cornermark | AS |
| Source | A Wn Mus.Hs._10123_fol103v104r97v98r |
 | no countermark |  |  |
| watermark | cornermark | sheet  |
Twinmark P89B
| Watermark | 3 crescents / M |
| Selenometrie in mm | xy: 15, xz: 79 |
| Cornermark | AS |
| Source | A Wn Mus.Hs._10123_fol101v102r99v100r |
 | no twin countermark |  |  |
| twin watermark
| twin cornermark
| twin sheet |
Copyists and works |
|
| Copyists using paper P89 | WK60G, WK60R, WK67B, WK68F, WK68H, WK71F, WK71K, WK71P, WK73F |
| Scores written on paper P89 | Bonno_2991-F2, Gassmann_18083, Gassmann_27.5.1–3, Gluck_10123, Gluck_17782, Hasse_17288, Piccinni_17811, Scolari_1065 |
| Staff ruling on paper P89 | 10/190A, 12/187C |