| Paper |
 P21
 |
| Date of use | 1772 |
| Paper mill | Giovanni Battista Tadeoti, Toscolano |
Watermark P21A
| Watermark | 3 crescents |
| Selenometrie in mm | xy: 19, xz: 65 |
| Countermark | crown with a pointed top / B / GT |
| Source | A Wn Mus.Hs._1058_3_fol44v43r38v37r |
 |  |  |
| watermark | countermark | sheet  |
Twinmark P21B
| Watermark | 3 crescents |
| Selenometrie in mm | xy: 18, xz: 68 |
| Countermark | crown with a pointed top / B / GT |
| Source | A Wn Mus.Hs._1058_3_fol45v46r51v52r |
 |  |  |
| twin watermark
| twin countermark
| twin sheet |
Copyists and works |
|
| Copyists using paper P21 | WK71A, WK71G |
| Scores written on paper P21 | Gassmann_18075, Gazzaniga_1058 |
| Staff ruling on paper P21 | 10/184N |