| Regimental number | 1643 |
| Place of birth | Mangalore Victoria |
| Religion | Protestant |
| Occupation | Railway employee |
| Address | Willbriggie, New South Wales |
| Marital status | Married |
| Age at embarkation | 24 |
| Next of kin | Wife, Mrs Verey Wallin, PO, Willbriggie, New South Wales |
| Enlistment date | 30 November 1914 |
| Rank on enlistment | Private |
| Unit name | 2nd Battalion, 3rd Reinforcement |
| AWM Embarkation Roll number | 23/19/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A49 Seang Choon on 11 February 1915 |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 2nd Battalion |
| Fate | Returned to Australia 8 May 1919 |
| Family/military connections | Brother: 4237 Lance Corporal William Seymour WALLIN, 2nd Machine Gun Bn, died of wounds, 11 August 1918. |