| Regimental number | 52582 |
| Occupation | Farmer |
| Next of kin | Father, A Coster, Kingsdown, Timaru |
| Rank on embarkation | Private |
| Unit name | New Zealand Expeditionary Force, 28th Reinforcements (First Draft), Wellington Infantry Regiment, B Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT Waitemata on |
| Final rank | Private |
| Final unit | 1st Battalion, Wellington Infantry Regiment |
| Fate | Killed in Action |
| Age at death from cemetery records | 27 |
| Place of burial | No known grave |
| Commemoration details | Euston Road Cemetery (Special Memorial B2), Colincamps, Somme, France |
| Miscellaneous information from cemetery records | Parents: Alfred and Catherine Coster, 29 The Rigi, Kelburn, Wellington, New Zealand |
| Sources | Nominal Roll Vol. 3: Roll 69, p. 7 |