| Moss | John | Kirup | Studebaker | BN ● 18 | Balingup Road Board | 1923-24 |
| Moss | L. B. | Merriden | Bean | MD ● 80 | Merredin Road Board | 1925-26 |
| Moss | L. B. B. | Kojonup | Essex | KO ● 51 | Kojonup Road Board | 1923-24 |
| Moss | M. | 634 Beaufort Street, Perth | Ford | 13716 | Metro Private Car | 1926-27 |
| Moss | M. K. | 3 Lake Street | Ford 20 H.P. | P 23 | Perth Municipality | 1915 |
| Moss | M. K. | 203 Lake Street | Ford 20 H.P. | P 23 | Perth Municipality | 1916 |
| Moss | M. K. | 203 Lake Street | Oakland 20 H.P. | P 23 | Perth Municipality | 1919 |
| Moss | M. M. | 20 Dean Street, Cottesloe | Buick | 6481 | Metro Private Car | 1924-25 |
| Moss | W. E. | Kondinin | Chevrolet | KN ● 67 | Kondinin Road Board | 1927-28 |
| Moss | W. E. C. | Narrogin | Maxwell 26 H.P. | NGN 15 | Narrogin Municipality | 1915 |
| Moss | W. E. C. | Narrogin | Maxwell 20 H.P. | NGN 15 | Narrogin Municipality | 1916 |
| Moss | W. E. C. | Narrogin | Ford Truck | NGN 14 | Narrogin Municipality | 1925-26 |
| Moss | W. E. C. | Narrogin | Ford Truck | NGN 14 | Narrogin Municipality | 1926-27 |
| Moss | W. E. C. | 11 Labouchere Road, South Perth | Dodge | 1282 | Metro Private Car | 1927-28 |
| Mossop | Jos. | Balgarrup | Chevrolet | WA ● 56 | Manjimup Road Board | 1927-28 |
| Motor Ambulance | - | Municipality of Northam | Buick | N 5 | Northam Municipality | 1925-26 |
| Motor Ambulance | - | Municipality of Northam | Buick | N 5 | Northam Municipality | 1927-28 |
| Motor Ambulance Municipality | - | Northam | Buick | N 5 | Northam Municipality | 1926-27 |
| Motor Deliveries Ltd | - | 147 Havelock Street, West Perth | Dealers | 20079 | Metro Dealers Car | 1925-26 |
| Motor Parts Ltd | - | Wellington Street, Perth | Ford Wagon | 13192 | Metro Private Car | 1926-27 |
| Motor Vehicles Ltd | - | 88 Railway Parade, West Perth | Dealers | 20248 | Metro Dealers Car | 1927-28 |
| Mott | B. B. | Kellerberrin | Bean Truck | KE ● 250 | Kellerberrin Road Board | 1927-28 |
| Mott | C. | Dumbleyung | Studebaker | DU ● 56 | Dumbleyung Road Board | 1923-24 |
| Mott | C. | Dumbleyung | Studebaker | DU ● 56 | Dumbleyung Road Board | 1924-25 |
| Mott | C. | Dumbleyung | Studebaker | DU ● 56 | Dumbleyung Road Board | 1925-26 |
| Mott | C. | Dumbleyung | Studebaker | DU ● 56 | Dumbleyung Road Board | 1927-28 |
| Mott | H | Dumbleyung | Studebaker | DU ● 101 | Dumbleyung Road Board | 1926-27 |
| Mott | H. | Dumbleyung | Studebaker | DU ● 101 | Dumbleyung Road Board | 1925-26 |
| Mott | H. | Dumbleyung | Studebaker | DU ● 101 | Dumbleyung Road Board | 1927-28 |
| Mott | Mrs M. | Brookton | Ford | BO ● 51 | Brookton Road Board | 1924-25 |
| Mott | Mrs M. A. | Brookton | Ford | BO ● 51 | Brookton Road Board | 1925-26 |
| Mott | Mrs M. A. | Brookton | Ford | BO ● 51 | Brookton Road Board | 1926-27 |
| Mott | Mrs M. A. | Brookton | Ford | BO ● 51 | Brookton Road Board | 1927-28 |
| Mott | Roland | Brookton | Ford | BO ● 98 | Brookton Road Board | 1926-27 |
| Mott | Roland | Brookton | Ford | BO ● 98 | Brookton Road Board | 1927-28 |
| Mott | W. | Dumbleyung | Studebaker | DU ● 16 | Dumbleyung Road Board | 1926-27 |
| Mott | W. | Brookton | Federal-Knight Truck | BO ● 29 | Brookton Road Board | 1927-28 |
| Mott | W. | Dumbleyung | Studebaker | DU ● 16 | Dumbleyung Road Board | 1927-28 |
| Mott | Walter | Dumbleyung | Overland | DU ● 36 | Dumbleyung Road Board | 1923-24 |
| Mott & Johns | - | - | Overland 35 H.P. | NM 3 | Norseman Municipality | 1915 |
| Motteram | H. | 1 Dunbar Street, Claremont | Chevrolet | 8021 | Metro Private Car | 1925-26 |
| Motteram | H. | 1 Dunbar Street, Claremont | Chevrolet | 8021 | Metro Private Car | 1926-27 |
| Motteram | J. H. | 3 Dunbar Street, Claremont | Triumph | 95 | Metro Motorcycle | 1922-23 |
| Motteram | M. E. | Dunbar Road, Claremont | Motorcycle | C 99 | Claremont Municipality | 1917-18 |
| Motteram | M. E. | Dunbar Road, Claremont | - | C 99 | Claremont Municipality | 1919 |
| Mottram | C. F. | 25 Sunbury Road, Victoria Park | Ford | 2278 | Metro Private Car | 1927-28 |
| Mottram | C. W. | Manjimup | Dodge | WA ● 101 | Manjimup Road Board | 1925-26 |
| Mottram | C. W. | Manjimup | Dodge | WA ● 101 | Manjimup Road Board | 1926-27 |
| Mottram | C. W. | Manjimup | Dodge | WA ● 101 | Manjimup Road Board | 1927-28 |
| Mottram | D. | Manjimup | Ford Van | WA ● 214 | Manjimup Road Board | 1927-28 |
