| Williamson | J. L. | Cranbrook | Overland | PL ● 52 | Plantagenet Road Board | 1926-27 |
| Williamson | J. L. | Cranbrook | Overland | CB ● 1 | Cranbrook Road Board | 1927-28 |
| Williamson | J. L. | Cranbrook | Chevrolet Truck | CB ● 59 | Cranbrook Road Board | 1927-28 |
| Williamson | K. R. | Narrikup | Studebaker | PL ● 118 | Plantagenet Road Board | 1924-25 |
| Williamson | K. R. | Narrikup | Essex | PL ● 118 | Plantagenet Road Board | 1925-26 |
| Williamson | K. R. | Narricup | Essex | PL ● 118 | Plantagenet Road Board | 1926-27 |
| Williamson | K. R. | Narrikup | Essex | PL ● 44 | Plantagenet Road Board | 1927-28 |
| Williamson | K. R. | Narrikup | Chevrolet Truck | PL ● 96 | Plantagenet Road Board | 1927-28 |
| Williamson | R. | Perth | F.N. 2¾ H.P. Motorcycle | P 676 | Perth Municipality | 1915 |
| Williamson | R. | 89 Moran Street, Boulder | Ford | B 30 | Boulder Municipality | 1927-28 |
| Williamson | R. B. | Dale Beverly | Chevrolet | BE ● 229 | Beverley Road Board | 1925-26 |
| Williamson | R. B. | Dale Beverley | Chevrolet | BE ● 229 | Beverley Road Board | 1926-27 |
| Williamson | R. B. | Dale | Chevrolet | BE ● 229 | Beverley Road Board | 1927-28 |
| Williamson | R. H. | 8 Thomas Street | Humber 11 H.P. | P 284 | Perth Municipality | 1915 |
| Williamson | R. M. | Hoffman Mill | Dodge | H ● 225 | Harvey Road Board | 1927-28 |
| Williamson | T. | Dalwallinu | Dodge | DL ● 99 | Dalwallinu Road Board | 1925-26 |
| Williamson | T. | Dalwallinu | Dodge | DL ● 99 | Dalwallinu Road Board | 1926-27 |
| Williamson | T. | Dalwallinu | Dodge | DL ● 99 | Dalwallinu Road Board | 1927-28 |
| Williamson | T. G. | Kellerberrin | Ford | KE ● 248 | Kellerberrin Road Board | 1926-27 |
| Williamson | T. G. | Kellerberrin | Ford | KE ● 248 | Kellerberrin Road Board | 1927-28 |
| Williamson | T. J. | Dalwallinu | Overland | DL ● 9 | Dalwallinu Road Board | 1922-23 |
| Williamson | T. J. | Dalwallinu | Overland | DL ● 9 | Dalwallinu Road Board | 1923-24 |
| Williamson | T. J. | Dalwallinu | Overland | DL ● 9 | Dalwallinu Road Board | 1924-25 |
| Williamson | W. J. | Holyoake | Ford | MY ● 138 | Murray Road Board | 1927-28 |
| Williamson | W. T. | Kununoppin | Ford Truck | KTY ● 162 | Kununoppin-Trayning Road Board | 1927-28 |
| Williamson | Wm A. | 14 Fremantle Road, South Perth | Morris Cowley | 12814 | Metro Private Car | 1927-28 |
| Williamson & Groom | - | Dumbleyung | Chevrolet | DU ● 92 | Dumbleyung Road Board | 1926-27 |
| Williamson & Groom | - | Dumbleyung | Chevrolet | DU ● 92 | Dumbleyung Road Board | 1927-28 |
| Willians | John | Rockingham | Gray Wagon | RO ● 59 | Rockingham Road Board | 1927-28 |
| Willie | E. G. | Jessop's Well | Ford | MN ● 35 | Menzies Road Board | 1927-28 |
| Willimott | F. E. S. | Bridgetown | Dodge | B ● 125 | Bridgetown Road Board | 1927-28 |
| Willimott | J. | Walkaway | Dodge | GH ● 25 | Greenough Road Board | 1925-26 |
| Willimott | J. | Walkaway | Dodge | GH ● 25 | Greenough Road Board | 1926-27 |
| Willimott | J. | Walkaway | Dodge | GH ● 25 | Greenough Road Board | 1927-28 |
| Willington | M. | 433 Wellington Street | Douglas 2¾ H.P. Motorcycle | P 26 | Perth Municipality | 1915 |
| Willinott | E. P. | Margaret River | Dodge | AU ● 1 | Augusta Road Board | 1926-27 |
| Willinott | E. P. | Margaret River | Dodge | AU ● 1 | Augusta Road Board | 1927-28 |
| Willis | A. | 36 Harper Street, West Midland | Dodge | 8803 | Metro Private Car | 1925-26 |
| Willis | A. | 9 Muriel Street, Midland Junction | Dodge | 8803 | Metro Private Car | 1926-27 |
| Willis | A. | 18 Lillian Street, Cottesloe Beach | Ford | 6133 | Metro Private Car | 1926-27 |
| Willis | A. | 9 Muriel Street, Midland Junction | Dodge | 8803 | Metro Private Car | 1927-28 |
| Willis | A. B. G. | Mount Barker | Rugby | PL ● 69 | Plantagenet Road Board | 1927-28 |
| Willis | A. J. | 79 Queen Victoria Street, Fremantle | Ford | 12288 | Metro Private Car | 1926-27 |
| Willis | Archibald B. G. | Mount Barker | Ford | PL ● 87 | Plantagenet Road Board | 1924-25 |
| Willis | Arthur | 15 Lillian Street, Cottesloe | Ford | 6133 | Metro Private Car | 1927-28 |
| Willis | D. | 566 Newcastle Street, Perth | Ford | 4878 | Metro Private Car | 1923-24 |
| Willis | E. | 53 Churchill Avenue, Subiaco | Chevrolet | 8533 | Metro Private Car | 1925-26 |
| Willis | E. | 53 Churchill Avenue, Subiaco | Buick | 8533 | Metro Private Car | 1927-28 |
| Willis | E. C. | Leonora | Reo Truck | LM ● 27 | Leonora-Malcolm Road Board | 1926-27 |
| Willis | E. C. | Leonora | Reo Truck | LM ● 27 | Leonora-Malcolm Road Board | 1927-28 |
