| Duncan | C. L. | Greenough | Overland | GH ● 45 | Greenough Road Board | 1925-26 |
| Duncan | C. L. | Greenough | Dodge | GH ● 14 | Greenough Road Board | 1926-27 |
| Duncan | C. L. | Greenough | Overland | GH ● 45 | Greenough Road Board | 1926-27 |
| Duncan | C. L. | Greenough | Dodge | GH ● 14 | Greenough Road Board | 1927-28 |
| Duncan | C. L. | Greenough | Overland | GH ● 45 | Greenough Road Board | 1927-28 |
| Duncan | Charles | South Greenough | Dodge 23 H.P. | GH ● 14 | Greenough Road Board | 1922-23 |
| Duncan | Charles L. | South Greenough | Dodge 23 H.P. | GH ● 14 | Greenough Road Board | 1923-24 |
| Duncan | D. F. | Greenough | Ford | GH ● 26 | Greenough Road Board | 1924-25 |
| Duncan | D. F. | Greenough | Ford | GH ● 26 | Greenough Road Board | 1925-26 |
| Duncan | D. F. | Greenough | Ford | GH ● 26 | Greenough Road Board | 1926-27 |
| Duncan | D. F. | Greenough | Ford | GH ● 26 | Greenough Road Board | 1927-28 |
| Duncan | F. | Gugeri Street, Claremont | - | Ce 21 | Cottesloe Municipality | 1915 |
| Duncan | F. | Gugeri Street | Ford | C 35 | Claremont Municipality | 1915 |
| Duncan | F. | Princess Road, Claremont | Car | C ● 35 | Claremont Municipality | 1917-18 |
| Duncan | F. | Dunbar Road, Claremont | | C 18 | Claremont Municipality | 1919 |
| Duncan | F. | Dunbar Road, Claremont | - | C 35 | Claremont Municipality | 1919 |
| Duncan | F. G. | Powell Street | Ford | B 107 | Boulder Municipality | 1927-28 |
| Duncan | G. | Kellerberrin | Ford | KE ● 336 | Kellerberrin Road Board | 1927-28 |
| Duncan | G. O. | Gnowangerup | Ford | GN ● 144 | Gnowangerup Road Board | 1926-27 |
| Duncan | G. O. | Gnowangerup | Ford | GN ● 186 | Gnowangerup Road Board | 1927-28 |
| Duncan | H. M. | 91 Seventh Ave Maylands | Scripps Booth | 6435 | Metro Private Car | 1924-25 |
| Duncan | H. M. | 91 Seventh Avenue, Maylands | Scripps-Booth | 6435 | Metro Private Car | 1925-26 |
| Duncan | H. M. | 91 Seventh Avenue, Maylands | Citroen | 13708 | Metro Private Car | 1926-27 |
| Duncan | H. M. | 91 Seventh Avenue, Maylands | Overland | 13939 | Metro Private Car | 1927-28 |
| Duncan | J. | Olive Street, Guildford | Chevrolet | 9157 | Metro Private Car | 1925-26 |
| Duncan | J. | Wedgecarrup | Rugby | W ● 84 | Wagin Road Board | 1925-26 |
| Duncan | J. | Olive Street, Guildford | Chevrolet | 9157 | Metro Private Car | 1926-27 |
| Duncan | J. | Wedgecarrup | Rugby | W ● 84 | Wagin Road Board | 1926-27 |
| Duncan | J. | 19 Geddes Street, Victoria Park | Morris-Cowley | 8089 | Metro Private Car | 1926-27 |
| Duncan | J. | Olive Street, Guildford | Chevrolet | 9157 | Metro Private Car | 1927-28 |
| Duncan | J. | 19 Geddes Street, Victoria Park | Morris-Cowley | 8089 | Metro Private Car | 1927-28 |
| Duncan | J. | Yorkrakine | Rugby | WM ● 346 | Wyalkatchem Road Board | 1927-28 |
| Duncan | John | Wagin | Rugby | W ● 84 | Wagin Road Board | 1924-25 |
| Duncan | Kenneth | Hopetown Street, South Perth | Chevrolet | 1287 | Metro Private Car | 1927-28 |
| Duncan | Mrs R. | Kellerberrin | Ford | KE ● 208 | Kellerberrin Road Board | 1926-27 |
| Duncan | Mrs R. | Kellerberrin | Ford | KE ● 208 | Kellerberrin Road Board | 1927-28 |
| Duncan | R. | Gugeri Street | Ford | C 16 | Claremont Municipality | 1915 |
| Duncan | R. | Gugeri Street | Ford | C 16 | Claremont Municipality | 1916 |
| Duncan | R. | Princess Road, Claremont | Car | C ● 16 | Claremont Municipality | 1917-18 |
| Duncan | R. | Princess Road, Claremont | - | C 16 | Claremont Municipality | 1919 |
| Duncan | R. | Bunbury | Overland | BY 84 | Bunbury Municipality | 1923 - 1924 |
| Duncan | R. | Princess Road, Claremont | Dodge | 3125 | Metro Private Car | 1924-25 |
| Duncan | R. | Bunbury | Overland | By 84 | Bunbury Municipality | 1924-25 |
| Duncan | R. | 24 Princess Road, Claremont | Dodge | 3125 | Metro Hire or Trade | 1925-26 |
| Duncan | R. | Kellerberrin | Ford | KE ● 69 | Kellerberrin Road Board | 1925-26 |
| Duncan | R. | Bunbury | Overland | BY 84 | Bunbury Municipality | 1925-26 |
| Duncan | R. | Nangeenan | Citroen | MD ● 123 | Merredin Road Board | 1926-27 |
| Duncan | R. | 24 Princess Road, Claremont | Dodge | 3125 | Metro Hire or Trade | 1926-27 |
| Duncan | R. | 24 Princess Road, Claremont | Dodge | 3125 | Metro Hire or Trade | 1927-28 |
| Duncan | R. | Maida Vale | Ford | DR ● 165 | Darling Range Road Board | 1927-28 |
