| Watson | F. P. | Northam | Buick | N ● 194 | Northam Road Board | 1927-28 |
| Watson | Flora | Northam | Ford | N ● 112 | Northam Road Board | 1925-26 |
| Watson | G. E. | Dumbleyung | Overland | DU ● 127 | Dumbleyung Road Board | 1926-27 |
| Watson | G. W. | Woodanilling | Napier | WO ● 12 | Woodanilling Road Board | 1919 |
| Watson | G. W. | Woodanilling | Overland | WO ● 12 | Woodanilling Road Board | 1924-25 |
| Watson | G. W. | Woodanilling | Overland | WO ● 12 | Woodanilling Road Board | 1925-26 |
| Watson | G. W. | Woodanilling | Overland | WO ● 12 | Woodanilling Road Board | 1926-27 |
| Watson | G. W. | Woodanilling | Overland | WO ● 12 | Woodanilling Road Board | 1927-28 |
| Watson | H. | 31 High Street, Fremantle | Durant | 1945 | Metro Private Car | 1924-25 |
| Watson | H. | Northam | Ford | N ● 110 | Northam Road Board | 1925-26 |
| Watson | H. | 31 High Street, Fremantle | Studebaker | 1945 | Metro Private Car | 1925-26 |
| Watson | H. | Koorda | Fiat | MM ● 70 | Mount Marshall Road Board | 1925-26 |
| Watson | H. | South Fremantle | Studebaker | 1945 | Metro Private Car | 1926-27 |
| Watson | H. | Koorda | Fiat | MM ● 70 | Mount Marshall Road Board | 1926-27 |
| Watson | H. | Northam | Ford | N ● 110 | Northam Road Board | 1926-27 |
| Watson | H. | Koorda | Fiat | MM ● 70 | Mount Marshall Road Board | 1927-28 |
| Watson | H. | - | Ford | N ● 31 | Northam Road Board | 1927-28 |
| Watson | H. | 92 Collins Street, Kalgoorlie | Ford | KMC 361 | Kalgoorlie Municipal Council | 1927-28 |
| Watson | H. A. | Wagin | Chevrolet 20 H.P. | W 7 | Wagin Road Board | 1916 |
| Watson | H. A. | Wagin | Chevrolet 20 H.P. | W ● 7 | Wagin Road Board | 1917-18 |
| Watson | H. A. | Wagin | Chevrolet 20 H.P. | W ● 7 | Wagin Road Board | 1919 |
| Watson | H. A. | Wagin | Chevrolet 20 H.P. | W ● 7 | Wagin Road Board | 1922-23 |
| Watson | H. A. | Wagin | Chevrolet 20 H.P. | W ● 7 | Wagin Road Board | 1923-24 |
| Watson | H. A. | Wagin | Chevrolet | W ● 7 | Wagin Road Board | 1925-26 |
| Watson | H. A. | Wagin | Chevolet | W ● 7 | Wagin Road Board | 1926-27 |
| Watson | H. A. | Wagin | Chevrolet | W ● 7 | Wagin Road Board | 1927-28 |
| Watson | H. G. | Ballidu | Dodge | WB ● 237 | Wongan-Ballidu Road Board | 1927-28 |
| Watson | H. J. | Roebourne | Overland | R ● 10 | Roebourne Road Board | 1919 |
| Watson | H. J. | Roebourne | Overland | R ● 10 | Roebourne Road Board | 1925-26 |
| Watson | H. J. | Roebourne | Overland | R ● 10 | Roebourne Road Board | 1926-27 |
| Watson | H. J. | Roebourne | Overland | R ● 10 | Roebourne Road Board | 1927-28 |
| Watson | H. J. | - | Chevrolet | N ● 54 | Northam Road Board | 1927-28 |
| Watson | H. J. & Co. | Roebourne | Overland | R ● 10 | Roebourne Road Board | 1923-24 |
| Watson | H. J. & Co. | Roebourne | Overland | R ● 11 | Roebourne Road Board | 1923-24 |
| Watson | Harold | Woodlands, Spearwood | Durant | 1945 | Metro Private Car | 1923-24 |
| Watson | Harold | Spearwood | Studebaker | 15851 | Metro Private Car | 1927-28 |
| Watson | Harold | Woodlands Fremantle | Studebaker | 1945 | Metro Private Car | 1927-28 |
| Watson | Ivy S. | 189 Thomas Street, Subiaco | Buick | 1035 | Metro Private Car | 1927-28 |
| Watson | J & S. | Nungarin | Rugby | NA ● 125 | Nungarin Road Board | 1927-28 |
| Watson | J. | - | Ford | N 110 | Northam Municipality | 1924-25 |
| Watson | J. | Pingrup | Rugby | KT ● 33 | Kent Road Board | 1925-26 |
| Watson | J. | Kalamunda | Overland Truck | DR ● 73 | Darling Range Road Board | 1926-27 |
| Watson | J. | Woodbridge Hotel, Guildford | Dodge | 8811 | Metro Private Car | 1926-27 |
| Watson | J. | Holyoake | Dodge | MY ● 178 | Murray Road Board | 1926-27 |
| Watson | J. | Pennapullin | Ford | N ● 49 | Northam Road Board | 1926-27 |
| Watson | J. | Pingrup | Rugby | KT ● 33 | Kent Road Board | 1926-27 |
| Watson | J. | Kondinin | Ford | KN ● 85 | Kondinin Road Board | 1927-28 |
| Watson | J. | Jennapullen | Ford | N ● 49 | Northam Road Board | 1927-28 |
| Watson | J. | Pingrup | Rugby | KT ● 33 | Kent Road Board | 1927-28 |
| Watson | J. | Kalamunda | Overland Truck | DR ● 73 | Darling Range Road Board | 1927-28 |
