Primo
| Name | Primo |
| Type | Sailing vessel |
| GRT | 65 tons |
| Country |  Italian |
| Built | |
| Builder | |
| Operator | |
| History |
U-boat attacks on Sailing vessel Primo
| Date | U-boat | Loss type | Position | Location | Route | Cargo | Casualties | |
| 1 | 22 Sep 1917 | UC 53 (Kurt Albrecht) | Sunk | 3 miles from Fimara Grande LV, SW of Curita Vecchia |
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