| Simpson | G. | Hardy Road, Belmont | Chevrolet Wagon | 13677 | Metro Private Car | 1926-27 |
| Simpson | G. | Karragullen | Chevrolet | 14535 | Metro Private Car | 1927-28 |
| Simpson | G. M. | South Street, Fremantle | Reo Wagon | 10004 | Metro Hire or Trade | 1925-26 |
| Simpson | G. M. | South Street, Fremantle | Reo Wagon | 10004 | Metro Hire or Trade | 1926-27 |
| Simpson | G. M. | South Street, Fremantle | Reo Wagon | 10004 | Metro Hire or Trade | 1927-28 |
| Simpson | G. M. | South Street, Beaconsfield | Chevrolet Wagon | 10906 | Metro Hire or Trade | 1927-28 |
| Simpson | G. W. | State Treasury Department, Perth | Oakland | 9646 | Metro Private Car | 1926-27 |
| Simpson | G. W. | State Treasury Department Perth | Oakland | 9646 | Metro Private Car | 1927-28 |
| Simpson | G. W. | Hardy Road, Belmont | Chevrolet Wagon | 13677 | Metro Private Car | 1927-28 |
| Simpson | Geo. | Karragullen | Chevrolet | A-K ● 60 | Armadale-Kelmscott Road Board | 1924-25 |
| Simpson | George | Ejanding | Ford | D ● 223 | Dowerin Road Board | 1927-28 |
| Simpson | H. | Waterloo | Ford Charabane | DA ● 59 | Dardanup Road Board | 1926-27 |
| Simpson | H. | Kellerberrin | Ford Truck | KE ● 106 | Kellerberrin Road Board | 1927-28 |
| Simpson | H. G. | 112 Varden Street, Kalgoorlie | Whippet | KMC 312 | Kalgoorlie Municipal Council | 1927-28 |
| Simpson | H. H. | Soloman Street, Palmyra | Oldsmobile | 12239 | Metro Private Car | 1927-28 |
| Simpson | H. M. | Hillside Station, Marble Bay | Austin | NU ● 1 | Nullagine Road Board | 1924-25 |
| Simpson | H. N. | Parker House, Perth | Essex | 2642 | Metro Private Car | 1923-24 |
| Simpson | H. T. | Quairading | Dort | Q ● 134 | Quairading Road Board | 1925-26 |
| Simpson | H. T. | Quairading | Dort | Q ● 134 | Quairading Road Board | 1926-27 |
| Simpson | H. T. | Quairading | Dort | Q ● 134 | Quairading Road Board | 1927-28 |
| Simpson | H. T. | Quairading | Chevrolet Truck | Q ● 245 | Quairading Road Board | 1927-28 |
| Simpson | J. | River Avenue | F.N. 2½ H.P. Motorcycle | CM 15 | Collie Municipality | 1916 |
| Simpson | J. | River Avenue | F.N. Motorcycle | CM 15 | Collie Municipality | 1917-18 |
| Simpson | J. | Roberts Street, Collie | Ford | CM 4 | Collie Municipality | 1925-26 |
| Simpson | J. | Roberts Street, Collie | Oldsmobile | CM 95 | Collie Municipality | 1925-26 |
| Simpson | J. | Roberts Street, Collie | Oldsmobile | CM 95 | Collie Municipality | 1926-27 |
| Simpson | J. | Narembeen | Dodge | NB ● 174 | Narembeen Road Board | 1927-28 |
| Simpson | J. | Roberts Street, Collie | Oldsmobile | CM 95 | Collie Municipality | 1927-28 |
| Simpson | J. F. | Britnall's Lane, Perth | Studebaker | 3121 | Metropolitan Hire and Trade Cars | 1923-24 |
| Simpson | J. F. | Britnell's Lane Perth | Studebaker | 3121 | Metro Private Car | 1924-25 |
| Simpson | J. F. | Britnall's Lane Perth | Studebaker | 3121 | Metro Hire or Trade | 1925-26 |
| Simpson | James | Hines Hill | Chevrolet | MD ● 124 | Merredin Road Board | 1926-27 |
| Simpson | James | Hines Hill | Chevrolet | MD ● 124 | Merredin Road Board | 1927-28 |
| Simpson | John F. | 119 Varden Street | Ford 15 H.P. | K ● 18 | Kalgoorlie Road Board | 1919 |
| Simpson | John S. | 73 Second Avenue, Mount Lawley | Oakland | 899 | Metro Private Car | 1927-28 |
| Simpson | Jos | Robert Street, Collie | Ford | CM 4 | Collie Municipality | 1924-25 |
| Simpson | Jos. | Robert Street | Ford | CM ● 4 | Collie Municipality | 1922-23 |
| Simpson | Jos. | Robert Street, Collie | Ford | CM 4 | Collie Municipality | 1923 - 1924 |
| Simpson | L. V. | Francis Street, Geraldton | Gray | GN 26 | Geraldton Municipality | 1925-26 |
| Simpson | R. D. | Stubberfield Street, Osborne Park | Ford Car | P ● 51 | Perth Road Board | 1924-25 |
| Simpson | Rev. H. W. | Broome | Indian Motorcycle | BM ● 3 | Broome Road Board | 1922-23 |
| Simpson | S. | Burracoppin | Dodge | MD ● 135 | Merredin Road Board | 1925-26 |
| Simpson | S. L. | 2 Waugh Street, North Perth | Flanders | 1377 | Metro Private Car | 1923-24 |
| Simpson | S. W | 36 aFrmer Street, North Perth | Dodge | 8655 | Metro Private Car | 1927-28 |
| Simpson | S. W. | 2 Waugh Street, North Perth | Dodge | 8655 | Metro Private Car | 1925-26 |
| Simpson | S. W. | 2 Waugh Street, North Perth | Dodge | 8655 | Metro Private Car | 1926-27 |
| Simpson | T. | - | Ford | CU ● 96 | Upper Chapman Road Board | 1925-26 |
| Simpson | T. | 11 Archdeacon Street, Nedlands | Buick | 9731 | Metro Private Car | 1926-27 |
| Simpson | T. | - | Ford | CU ● 96 | Upper Chapman Road Board | 1926-27 |
| Simpson | T. | 11 Archdeacon Street, Nedlands | Buick | 9731 | Metro Private Car | 1927-28 |
