| Watson | Joseph | - | Triumph | N 46 | Northam Road Board | 1919 |
| Watson | K. H. | 5 Stock Exchange Buildings | Dodge | 2675 | Metro Private Car | 1923-24 |
| Watson | K. Henry | 36 and 38 King Street, Perth | Briscoe | 4476 | Metro Private Car | 1923-24 |
| Watson | L | Pingelly | - | PN ● 69 | Pingelly Road Board | 1924-25 |
| Watson | L. | West Midland | B.S.A. | 3166 | Metro Private Car | 1922-23 |
| Watson | L. | Pingelly | Overland | PN ● 24 | Pingelly Road Board | 1923-24 |
| Watson | L. | 11 Montreal Road, West Midland | B.S.A. | 3166 | Metropolitan Hire and Trade Cars | 1923-24 |
| Watson | L. | 11 Montreal Road, West Midland | B.S.A. | 6914 | Metro Private Car | 1924-25 |
| Watson | L. | Pingelly | - | PN ● 69 | Pingelly Road Board | 1927-28 |
| Watson | L. R. | Woodanilling | Dodge | WO ● 11 | Woodanilling Road Board | 1924-25 |
| Watson | L. R. | Woodanilling | Dodge | WO ● 11 | Woodanilling Road Board | 1926-27 |
| Watson | L. R. | Woodanilling | Dodge | WO ● 11 | Woodanilling Road Board | 1927-28 |
| Watson | L. S. | Woodanilling | Dodge | WO ● 11 | Woodanilling Road Board | 1925-26 |
| Watson | Leonard | 11 Montreal Street, West Midland | Triumph | 1415 | Metro Motorcycle | 1922-23 |
| Watson | M. A. | Havelock Street, West Perth | Oakland | 13332 | Metro Private Car | 1927-28 |
| Watson | Maude A | Parker Street, East Fremantle | Buick | 5330 | Metro Private Car | 1927-28 |
| Watson | Mrs F | Northam | Ford | N ● 112 | Northam Road Board | 1927-28 |
| Watson | Mrs M | Three Springs | Oakland | CA ● 16 | Carnamah Road Board | 1924-25 |
| Watson | Mrs M. | Three Springs | Chevrolet 18 H.P. | MI ● 18 | Mingenew Road Board | 1922-23 |
| Watson | Mrs M. | Three Springs | Chevrolet 18 H.P. | MI ● 18 | Mingenew Road Board | 1923-24 |
| Watson | Mrs M. | 86 Grant Street, Cottesloe | Rugby | 9289 | Metro Private Car | 1926-27 |
| Watson | Mrs M. | 377 Beaufort Street, Perth | Studebaker | 2340 | Metro Private Car | 1927-28 |
| Watson | Mrs M. M. | Three Springs | Oakland | CA ● 16 | Carnamah Road Board | 1925-26 |
| Watson | Mrs M. M. | Three Springs | Oakland | CA ● 16 | Carnamah Road Board | 1926-27 |
| Watson | Mrs M. M. | Three Springs | Oakland | CA ● 16 | Carnamah Road Board | 1927-28 |
| Watson | Mrs W. | Burgoyne Street | Willys Knight | N 84 | Northam Municipality | 1923-24 |
| Watson | Mrs W. | Burgoyne Street | Willys-Knight | N 84 | Northam Municipality | 1925-26 |
| Watson | Mrs W. | Burgoyne Street | Willy- Knight | N 84 | Northam Municipality | 1926-27 |
| Watson | Mrs W. | Burgoyne Street | Willys-Knight | N 84 | Northam Municipality | 1927-28 |
| Watson | P. | 304 Albany Road, Victoria Park | Ford | 6364 | Metro Private Car | 1924-25 |
| Watson | P. | 2 Johnson Street, Cottesloe | Ford | 8669 | Metro Private Car | 1925-26 |
| Watson | P. | 2 Johnson Street, Cottesloe | Ford | 8669 | Metro Private Car | 1926-27 |
| Watson | P. | 2 Johnson Street, Cottesloe | Ford | 8669 | Metro Private Car | 1927-28 |
| Watson | P. | - | Ford | N ● 35 | Northam Road Board | 1927-28 |
| Watson | R. | - | Maxwell | WO ● 11 | Woodanilling Road Board | 1917-18 |
| Watson | R. | Kojonup | F.N. 2¾ H.P. Motorcycle | KO 2 | Kojonup Road Board | 1919 |
| Watson | R. | - | Maxwell | WO ● 11 | Woodanilling Road Board | 1919 |
| Watson | R. | 68 High Street, Fremantle | Ford | 6011 | Metro Private Car | 1924-25 |
| Watson | R. | Kojonup | Ford Truck | KO ● 35 | Kojonup Road Board | 1924-25 |
| Watson | R. | Kojonup | Ford Truck | KO ● 35 | Kojonup Road Board | 1925-26 |
| Watson | R. | York Terrace, Cottesloe Beach | Ford | 6011 | Metro Private Car | 1925-26 |
| Watson | R. | Bamboo Creek | Ford | MB ● 43 | Marble Bar Road Board | 1926-27 |
| Watson | R. | Kojonup | Ford Truck | KO ● 35 | Kojonup Road Board | 1926-27 |
| Watson | R. | Kojonup | Ford Truck | KO ● 35 | Kojonup Road Board | 1927-28 |
| Watson | R. A. | 184 Adelaide Terrace | Buick 15 H.P. | P 134 | Perth Municipality | 1915 |
| Watson | R. A. | Adelaide Terrace | Buick 15 H.P. | P 394 | Perth Municipality | 1915 |
| Watson | R. A. | 147 Adelaide Terrace | Buick 15 H.P. | P 134 | Perth Municipality | 1916 |
| Watson | R. A. | 147 Adelaide Terrace | Buick 20 H.P. | P 134 | Perth Municipality | 1917-18 |
| Watson | R. A. | 147 Adelaide Terrace | Buick 16 H.P. | P 134 | Perth Municipality | 1919 |
| Watson | R. A. | 61 Victoria Avenue, Claremont | Buick | 134 | Metro Private Car | 1923-24 |
