Telefon
| Name | Telefon |
| Type | Sailing vessel |
| GRT | 777 tons |
| Country |  Norwegian |
| Built | 1878 |
| Builder | H. C. Knudsen, Stavanger |
| Operator | A/S Telefon (Hannevig Brothers A/S), Kristiania |
| History |
U-boat attacks on Sailing vessel Telefon
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 26 Apr 1917 | UC 50 (Rudolf Seuffer) | Sunk | 54° 57'N, 1° 48'E | Fredrikshald – West Hartlepool | pit props | 0 |
Position of attack on Telefon
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