| Williams | W. F. | Busselton | Whippet | BN 44 | Municipality of Busselton | 1927-28 |
| Williams | W. H. | Coode Street, Bayswater | Studebaker | 8026 | Metro Private Car | 1925-26 |
| Williams | W. H. | Coode Street, Bayswater | Studebaker | 8026 | Metro Private Car | 1926-27 |
| Williams | W. H. | Bruce Rock | Austin | BK ● 138 | Bruce Rock Road Board | 1927-28 |
| Williams | W. J. | Katanning | Ford | KA ● 292 | Katanning Road Board | 1926-27 |
| Williams | W. J. | Katanning | Ford | KA ● 292 | Katanning Road Board | 1927-28 |
| Williams | W. M | Wongan Hills | Ford | WB ● 52 | Wongan-Ballidu Road Board | 1926-27 |
| Williams | W. M. | Wogan Hill | Ford | WB ● 52 | Wongan-Ballidu Road Board | 1927-28 |
| Williams | W. N. | South & Amherst Street, Fremantle | Chevrolet | 12147 | Metro Private Car | 1926-27 |
| Williams | W. W. | cr South & Amherst Street, B"field | Chevrolet | 12147 | Metro Private Car | 1927-28 |
| Williams | Walter | 12 Thomas Street, West Perth | Ford | 4412 | Metro Private Car | 1923-24 |
| Williams | Wilson | Dumbleyung | Indian Motorcycle | DU ● 3 | Dumbleyung Road Board | 1922-23 |
| Williams & Bennetts | - | 346 William Street | Ford 20 H.P. | P 1207 | Perth Municipality | 1919 |
| Williams & Breeze | - | - | Singer 3½ H.P. Motorcycle | N 6 | Northam Municipality | 1915 |
| Williams & Co | - | Wuraming | Ford | MR ● 20 | Marradong Road Board | 1927-28 |
| Williams & Co | - | Wuraming | Ford Wagon | MR ● 69 | Marradong Road Board | 1927-28 |
| Williams & Son | H. | Lambing Camp | Ford | PL ● 71 | Plantagenet Road Board | 1925-26 |
| Williams & Son | H. | Cranbrook | Ford | CB ● 35 | Cranbrook Road Board | 1926-27 |
| Williams & Son | H. | Lambing | Ford | PL ● 71 | Plantagenet Road Board | 1926-27 |
| Williams & Son | H. | Cranbrook | Ford | CB ● 35 | Cranbrook Road Board | 1927-28 |
| Williams & Son | S. | 75 Rokeby Road, Subiaco | Ford Wagon | 6634 | Metro Private Car | 1925-26 |
| Williams & Son | S. | 75 Rokeby Road, Subiaco | Ford Wagon | 6634 | Metro Private Car | 1926-27 |
| Williams & Son | S. | 75 Rokeby Road, Subiaco | Ford Wagon | 6634 | Metro Private Car | 1927-28 |
| Williams & Sons | H. | Lambing Camp, Cranbrook | Ford | PL ● 71 | Plantagenet Road Board | 1924-25 |
| Williams & Sperring | - | 51 First Avenue, Mount Lawley | Reo Bus | 3533 | Metro Private Car | 1924-25 |
| Williams & Sperring | - | 50 Raglan Road, North Perth | Reo Bus | 3586 | Metro Private Car | 1924-25 |
| Williams & Tonkin | - | Korong Station | Overland | MG ● 20 | Mount Margaret Road Board | 1926-27 |
| Williams and Sons | H. | Lambing Camp, Cranbrook | Ford | PL ● 71 | Plantagenet Road Board | 1923-24 |
| Williams Bros | - | Fitzgerald Street | Ford | N 62 | Northam Municipality | 1917-18 |
| Williams Bros | - | Fitzgerald Street | Triumph Motorcycle | N 68 | Northam Municipality | 1917-18 |
| Williams Bros | - | Fitzgerald Street | Dodge | N 12 | Northam Municipality | 1922-23 |
| Williams Bros | - | Fitzgerald Street | Case | N 129 | Northam Municipality | 1924-25 |
| Williams Bros | - | Fitzgerald Street | Hupmobile | N 33 | Northam Municipality | 1925-26 |
| Williams Bros | - | Fitzgerald Street | Case | N 129 | Northam Municipality | 1925-26 |
| Williams Bros | - | Emu Hill | Brockway Wagon | NB ● 82 | Narembeen Road Board | 1926-27 |
| Williams Bros | - | Fitzgerald Street | Hupmobile | N 33 | Northam Municipality | 1926-27 |
| Williams Bros | - | Fitzgerald Street | Case | N 129 | Northam Municipality | 1926-27 |
| Williams Bros | - | Emu Hill | Brockway Wagon | NB ● 82 | Narembeen Road Board | 1927-28 |
| Williams Bros | - | Fitzgerald Street | Hupmobile | N 33 | Northam Municipality | 1927-28 |
| Williams Bros | - | Fitzgerald Street | Reo | N 129 | Northam Municipality | 1927-28 |
| Williams Bros | - | Bedford Street, South Fremantle | Overland Wagon | 11524 | Metro Private Car | 1927-28 |
| Williams Bros. | - | Fitzgerald Street | Triumph | N 68 | Northam Municipality | 1919 |
| Williams-Narrogin Farmers Co-op. | - | Narrogin | Ford | NGN 31 | Narrogin Municipality | 1923-24 |
| Williamson | A. F. | 45 Mount Street | Singer 8-10 H.P. | P 39 | Perth Municipality | 1915 |
| Williamson | A. F. | 45 Mount Street | Buick 20 H.P. | P 39 | Perth Municipality | 1916 |
| Williamson | A. F. | 45 Mount Street | Buick 19 H.P. | P 39 | Perth Municipality | 1917-18 |
| Williamson | A. F. | 45 Mount Street | Buick 18 H.P. | P 39 | Perth Municipality | 1919 |
| Williamson | A. F. | 45 Mount Street, Perth | Dodge | 39 | Metro Private Car | 1922-23 |
| Williamson | A. T. | 45 Mount Street, Perth | Chevrolet | 39 | Metro Private Car | 1925-26 |
| Williamson | A. T. | 45 Mount Street, Perth | Chevrolet | 39 | Metro Private Car | 1926-27 |
