| Signature mark | NL 174/3444 |
|---|---|
| Subject | Glasplatte, Positiv |
| Title | Einfache Schallwelle Beschriftet mit: "Dr. L. Mach" |
| Duration | 25.11.1892 |
| Formal information |
Format (HxB):
8,4x8,4 cm |
| Rights notice | CC BY-SA 4.0 |