| Regimental number | 6973 |
| Religion | Church of England |
| Occupation | Electric junior |
| Address | Railway Gates, Harrow Road, Rockdale, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, M A L De Plater, Railway Gates, Harrow Road, Rockdale, Sydney, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 2nd Battalion, 23rd Reinforcement |
| AWM Embarkation Roll number | 23/19/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A24 Benalla on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Battalion |
| Fate | Returned to Australia |
| Miscellaneous details (Nominal Roll) | *Spelt Roy Koscuisko De Plater on NR |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |