| Paper |
 P91
 |
| Date of use | 1767 - 1768 |
| Paper mill | Vincenzo Vicario, Toscolano |
| Commentary | P91 is for the most part identical with P56, it differs only in the initials placed under the ornament (lily). Whereas in P56 there are the letters VV, P91 shows a horizontally mirrored V instead. P91 is used together with P56 in mixed quires. |
Watermark P91A
| Watermark | 3 crescents |
| Selenometrie in mm | xz: 89, xy: 19 |
| Countermark | lily / V (horizontally mirrored) |
| Source | A Wn Mus.Hs._17890_fol4v3r6v5r |
 |  |  |
| watermark | countermark | sheet  |
Twinmark P91B
| Watermark | 3 crescents |
| Selenometrie in mm | xz: 93, xy: 18 |
| Countermark | lily / V (horizontally mirrored) |
| Source | A Wn Mus.Hs._17890_fol51v52r53v54r |
 |  |  |
| twin watermark
| twin countermark
| twin sheet |
Copyists and works |
|
| Copyists using paper P91 | WK60X, WK67D, WK68B, WK68C, WK68D, WK69A, WK71K, WK72R |
| Scores written on paper P91 | Galuppi_1060, Gassmann_9946, Philidor_17890, Piccinni_1087 |
| Staff ruling on paper P91 | 10/184D, 10/185A, 10/185B |