| Regimental number | 1078 |
| Place of birth | Charters Towers Queensland |
| Religion | Presbyterian |
| Occupation | Well-borer |
| Address | c/o R G Arnold, Hergott Springs, South Australia |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, William Mearns Watt, Slater Street, Charters Towers, Queensland |
| Enlistment date | 2 March 1916 |
| Rank on enlistment | Corporal |
| Unit name | 3rd Pioneer Battalion, D Company |
| AWM Embarkation Roll number | 14/15/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A62 Wandilla on 6 June 1916 |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 3rd Pioneer Battalion |
| Fate | Effective abroad (still overseas) |
| Family/military connections | Brother: 472 Pte George Mearns WATT, 3rd Machine Gun Battalion, returned to Australia, 10May 1919. |
