| Regimental number | 865 |
| Place of birth | Rochester, Victoria |
| Religion | Church of England |
| Occupation | Labourer |
| Address | Rochester, Victoria |
| Marital status | Single |
| Age at embarkation | 26.8 |
| Height | 6' 0" |
| Weight | 154 lbs |
| Next of kin | John Watt, Rochester, Victoria |
| Previous military service | Nil |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 23rd Battalion, D Company |
| AWM Embarkation Roll number | 23/40/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A14 Euripides on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 4th Light Horse Regiment |
| Fate | Returned to Australia |
| Discharge date | |
| Family/military connections | Brothers: 2783 Lance Corporal Arthur WATT, 5th Division Train, returned to Australia, 20 July 1919; 1400 Pte David WATT, 15th Bn, returned to Australia, 29 July 1915; 1067 Pte Harold WATT, 14th Light Horse Regiment, returned to Australia, 7 January 1919; 819 Sergeant Oswald WATT, 4th Light Horse Regiment, returned to Australia, 15 June 1919. |
| Other details |
War service: Egypt, Gallipoli, Palestine Medals: 1914-15 Star, British War Medal, Victory Medal |
| Date of death | |
| Place of burial | Rochester Cemetery, Victoria |
| Sources | NAA: B2455, WATT Reuben |