| Regimental number | 474 |
| Date of birth | |
| Place of birth | Waverley, New South Wales |
| School | Petersham Public School, New South Wales |
| Religion | Church of England |
| Occupation | Fitter |
| Address | Norton Street, Leichhardt, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Mother, Mrs Miriam Tonkin, Norton Street, Leichhardt, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 20th Battalion, A Company |
| AWM Embarkation Roll number | 23/37/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A35 Berrima on |
| Regimental number from Nominal Roll | 39500 |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 4th Field Artillery Brigade |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 12729 Gunner Oliver TONKIN, 2nd Division Ammunition Column, returned to Australia 5 April 1919; 3815 Clive Graham TONKIN [not on Nominal Roll; not on database]. |
| Other details |
War service: Rabaul (contracted malaria; invalided to Australia; discharged medically unfit; re-enlisted), Egypt, Gallipoli, Western Front Returned to Australia. Re-enlisted, December 1917; embarked, 1 May 1918. Medals: 1914-15 Star, British War Medal, Victory Medal |