Spekulation
| Name | Spekulation |
| Type | Sailing vessel |
| GRT | 291 tons |
| Country |  Swedish |
| Built | 1881 |
| Builder | N. O. Gjomle, Grimstad |
| Operator | J. A. Jacobsson |
| History | Wooden bark. Built as Spekulation. |
U-boat attacks on Sailing vessel Spekulation
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 8 Jul 1917 | UC 55 (Horst Rühle von Lilienstern) | Sunk | Stopped and sunk by gunnery 50 miles SE of Hartlepool | Hull - Moss | pit coal | 0 |
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