B. J. Helfft – Adressbuch Berlin 1820
| Given name | B. J. |
|---|---|
| Family name | Helfft |
| Occupation | Kaufmann |
| Address | Neue Friedrichsstraße 36 |
| Place | Berlin |
| GOV identifier | BERLINJO62PM |
| Book | Adressbuch Berlin 1820 |
| page | 165 |
| Year | 1820 |
| Given name | B. J. |
|---|---|
| Family name | Helfft |
| Occupation | Kaufmann |
| Address | Neue Friedrichsstraße 36 |
| Place | Berlin |
| GOV identifier | BERLINJO62PM |
| Book | Adressbuch Berlin 1820 |
| page | 165 |
| Year | 1820 |