| Regimental number | 33403 |
| Occupation | Driver |
| Next of kin | Father, Henry John William Mason, 168 Sydney Street, Wellington |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 21st Reinforcements, Wellington Infantry Battalion, B Company |
| Embarkation details | Unit embarked from Wellington on board Ulimaroa on |
| Sources | Nominal Roll Vol. 3: Roll 52, p. 9 |