| Regimental number | 5734 |
| Place of birth | Adelaide South Australia |
| Religion | Church of England |
| Occupation | Grocer |
| Address | Northam, Western Australia |
| Marital status | Single |
| Age at embarkation | 28 |
| Next of kin | Father, Conrad Jahn, Forrest Street, Leake Estate, Northam, Western Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 16th Battalion, 18th Reinforcement |
| AWM Embarkation Roll number | 23/33/4 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A48 Seang Bee on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Division Train |
| Fate | Returned to Australia |
| Family/military connections | Brother: 3928 Pte Conrad Albert Alford JAHN, 4th Pioneer Bn, killed in action, 5 August 1916. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |