Serie II; Plaster models
| Number | Title | Date of Design | Dimension (cm) | Material |
| SerieII, nr. 1a | Model of a Kummer surface. All sixteen double points are real. | 1877 | 21-21-18 | Plaster |
| Serie II, nr. 1b | Model of a Kummer surface. Eight double points are real. | 1877 | 30-20 | Plaster |
| Serie II, nr. 1c | Model of a Kummer surface. Four double points are real. | 1877 | 20-15 | Plaster |