Ludwig
| Name | Ludwig |
| Type | Sailing vessel |
| GRT | 88 tons |
| Country |  Swedish |
| Built | 1879 |
| Builder | |
| Operator | AB. Bröderna Löfgren, Gävle |
| History | Or of 78 grt. |
U-boat attacks on Sailing vessel Ludwig
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 9 Jun 1917 | UC 57 (Friedrich Wißmann) | Sunk | 25 miles N of Oerker | Gävle-Mäntyluoto | Siliceous iron and agriculture machinery | 0 |
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