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| Type | Company |
| Location | Hagen (North Rhine-Westphalia) |
| Founding | 1910 |
| Industry | Trade, General |
| NACE code | 47.71 |
| Parent organization | KarstadtQuelle AG |
| Preceeding org. | Leffers AG |
| GND | 217681-6 |
| Holdings | Newspaper clippings: 1927-1943, 1971-2005 Annual reports: 1916-1943/1944, (1944-1947), -2003 |
| Signature | A10 W 15 |
| includes | Sinn AG (1984-, GND 5282925-X); SinnLeffers AG (1997-, GND 16031362-4); Westdeutsche Handelsgesellschaft Gebr. Sinn AG (1972-, GND 217680-4) |
| URI | https://pm20.zbw.eu/folder/co/044522 |
| ID | co/044522 |