| Roberts | W. | Carnarvon | Dodge | CN 39 | Carnarvon Municipal Council | 1926-27 |
| Roberts | W. | Eujynin | Maxwell | BK ● 162 | Bruce Rock Road Board | 1927-28 |
| Roberts | W. | Augusta | Ford Truck | AU ● 93 | Augusta Road Board | 1927-28 |
| Roberts | W. | Carmel | Chevrolet | DR ● 35 | Darling Range Road Board | 1927-28 |
| Roberts | W. E. | Nungarin | Ford Truck | NA ● 41 | Nungarin Road Board | 1927-28 |
| Roberts | W. G. | Carnarvon | Dodge | CN 4 | Carnarvon Municipal Council | 1922-23 |
| Roberts | W. G. | Carnarvon | Reo Truck | GU ● 29 | Upper Gascoyne Road Board | 1924-25 |
| Roberts | W. H. | Bulimba Road, Claremont | - | CL ● 113 | Claremont Road Board | 1919 |
| Roberts | W. H. | 128 Cambridge Street, West Leederville | Oldsmobile | 5901 | Metro Private Car | 1924-25 |
| Roberts | W. H. | Carnarvon | Dodge | CN 39 | Carnarvon Municipal Council | 1925-26 |
| Roberts | W. H. | Dowerin | Stewart Truck | D ● 150 | Dowerin Road Board | 1926-27 |
| Roberts | W. H. | 128 Cambridge Street, West Leederville | Oldsmobile | 5901 | Metro Private Car | 1926-27 |
| Roberts | W. H. | Dowerin | Oldsmobile | D ● 111 | Dowerin Road Board | 1927-28 |
| Roberts | W. H. | Dowerin | Stewart Truck | D ● 150 | Dowerin Road Board | 1927-28 |
| Roberts | W. H. | Dowerin | Chrysler | D ● 238 | Dowerin Road Board | 1927-28 |
| Roberts | Wm. | Dalwallinu | Car | DL ● 2 | Ninghan Road Board | 1917-18 |
| Roberts | Wm. | 19 Wright Street, Beaconsfield | Gray | 12199 | Metro Private Car | 1927-28 |
| Roberts | Wm. | 19 Wright Street, Beaconsfield | Gray Wagon | 9234 | Metro Private Car | 1927-28 |
| Roberts & Kelly | - | 22 Albert Street, West Perth | Reo Bus | 3636 | Metro Hire or Trade | 1924-25 |
| Roberts & Sons | - | 275 Onslow Road, West Perth | Chevrolet Van | 9514 | Metro Private Car | 1926-27 |
| Roberts & Sons | - | 275 Onslow Road, West Subiaco | Chevrolet Van | 9514 | Metro Private Car | 1927-28 |
| Roberts Bros | - | Fitzgerald Street | Ford Lorry | N 189 | Northam Municipality | 1925-26 |
| Roberts Bros | - | Moora | Chevrolet Truck | M ● 214 | Moora Road Board | 1927-28 |
| Roberts Tyre Works | - | 397 Hay Street, Perth | Triumph | 317 | Metro Motorcycle | 1922-23 |
| Robertson | - | 305 Wellington Street | Dealers | 20069 | Metro Dealers Car | 1926-27 |
| Robertson | A. | 29 Ragian Road, North Perth | Essex | 11768 | Metro Private Car | 1926-27 |
| Robertson | A. | 29 Raglan Road, North Perth | Essex | 11768 | Metro Private Car | 1927-28 |
| Robertson | A. D. | Federation Street, Mount Hawthorn | Chevrolet Truck | 4974 | Metro Private Car | 1927-28 |
| Robertson | A. J. | Kelmscott | Chevrolet Wagon | 6884 | Metro Private Car | 1926-27 |
| Robertson | C. | Carnamah | Chevrolet | CA ● 96 | Carnamah Road Board | 1926-27 |
| Robertson | C. | Carnamah | Chevrolet | CA ● 96 | Carnamah Road Board | 1927-28 |
| Robertson | C. | Carnamah | Chrysler | CA ● 254 | Carnamah Road Board | 1927-28 |
| Robertson | C. B. | Katanning | Triumph | KA 8 | Katanning Road Board | 1916 |
| Robertson | C. B. | Katanning | Triumph Motorcycle | KA ● 8 | Katanning Road Board | 1917-18 |
| Robertson | C. B. | Katanning | Triumph | KA 8 | Katanning Road Board | 1919 |
| Robertson | C. B. | Katanning | Ford | KA ● 14 | Katanning Road Board | 1926-27 |
| Robertson | C. B. | Katanning | Ford | KA ● 14 | Katanning Road Board | 1927-28 |
| Robertson | D. | Worsley | Ford | H ● 174 | Harvey Road Board | 1927-28 |
| Robertson | Dr L. J. | 322 Hay Street, Subiaco | Whippet | 9389 | Metro Private Car | 1926-27 |
| Robertson | Dr L. J. | 322 Hay Street, Subiaco | Whippet | 9389 | Metro Private Car | 1927-28 |
| Robertson | Dr. L. | 322 Hay Street | Car | S 53 | Subiaco Municipality | 1916 |
| Robertson | Dr. L. | Hay Street | - | S 53 | Subiaco Municipality | 1919 |
| Robertson | E. W. | Lawlers | Overland | LA ● 31 | Lawlers Road Board | 1927-28 |
| Robertson | Edith | 88 Seventh Avenue, Maylands | Chevrolet | 5496 | Metro Private Car | 1927-28 |
| Robertson | F. L. | 200 Saint George's Terrace | Hupmobile | 2387 | Metro Private Car | 1922-23 |
| Robertson | F. L. | 3 Esplanade Mansions, Perth | Hupmobile | 2387 | Metro Private Car | 1923-24 |
| Robertson | Frank | 2 Darley Street, South Perth | Pontiac | 826 | Metro Private Car | 1927-28 |
| Robertson | G. | Darlot | Ford | LA ● 15 | Lawlers Road Board | 1926-27 |
| Robertson | G. | Darlot | Buick | LA ● 21 | Lawlers Road Board | 1926-27 |
| Robertson | G. | Darlot | Ford | LA ● 15 | Lawlers Road Board | 1927-28 |
