| Signature mark | NL 174/1677 |
|---|---|
| Subject | Brief |
| Author |
Keller, Walther
|
| Recipient |
Mach, Ernst
|
| Title | Keller, Walther an Mach, Ernst |
| Places | Stuttgart |
| Duration | 18.07.1912 |
| Scope | 1 S. ms. |
| Rights notice | CC BY-SA 4.0 |