| Regimental number | 6240 |
| Place of birth | Langhorne Creek, South Australia |
| School | Langhorne's Creek Public School, South Australia |
| Religion | Methodist |
| Occupation | Labourer |
| Address | Langhornes Creek, South Australia |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, Joseph James Duffield, Langhornes Creek, South Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 10th Battalion, 20th Reinforcement |
| AWM Embarkation Roll number | 23/27/4 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A68 Anchises on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 27th Battalion |
| Fate | Killed in Action |
| Place of death or wounding | Ypres, Belgium |
| Age at death | 25 |
| Age at death from cemetery records | 25 |
| Panel number, Roll of Honour, Australian War Memorial | 110 |
| Miscellaneous information from cemetery records | Parents: Joseph James and Martha Lavina DUFFIELD, Langhorne's Creek, South Australia |
| Family/military connections | Brother: 6062 Pte William Frederick DUFFIELD, 10th Bn, returned to Australia, 25 January 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |