| Maker | Date Estimate | Region/ Country |
| Bazin, Uncoloured Proof Sheet | 1746 | Rennes, France |
| Duchesnes, Uncoloured Proof Sheet | 1746 | Rennes, France |
| F Stot, Uncoloured Proof Sheet | 1746 | Rennes, France |
| Lesca | c 1760 | Agen, France |
| Lauret | 1760-1780 | Nismes, France |
| F Solesio | c 1850 | Genova, Italy |
| P A Keusters | c 1768-1789 | Bruxelles, Belgium |
| Unknown | c 1840-60 | Rouen I pattern |
| Rochias | c 1800-25 | Neuchatel / Lyon pattern |
| Jean van den B. | mixed 1707 / 1722 | ? |
| Jean Gisaine | 1740s | Dinant sur Meuse, France |
| Pierre Le Nouvel | 1700-1710 | Rouen (but Paris pattern), France |
| plainbacks reference number and maker | Date Estimate | Country |
| I57 Biermans | 1891 | Belgium |
| I12/13 Dondorf (double pack) | 1880 | Germany |
| I9 Frommann & Morian | 1890 | Germany |
| I58 Mesmaekers | 1880 | Belgium |
| I60 Mesmaekers | 1900 | Belgium |
| I70 B P Grimaud | 1900 | France |
| I7 Van Genechten | 1880 | Belgium |
| I59 Van Genechten | 1890 | Belgium |
