| Colvin | R. | 50 Salisbury Street, Leederville | Fiat | 6279 | Metro Private Car | 1926-27 |
| Colvin | R. | 50 Salisbury Street, Leederville | Fiat | 6279 | Metro Private Car | 1927-28 |
| Colvin & Co | J. | Cleaver Street, Perth | Ford Truck | 6351 | Metro Private Car | 1924-25 |
| Colvin & Co | J. | Cleaver Street, Perth | Ford Wagon | 1112 | Metro Private Car | 1925-26 |
| Colvin & Co | J. | Cleaver Street, Perth | Ford Wagon | 1112 | Metro Private Car | 1927-28 |
| Colvin J. & Co | - | Cleaver Street, Perth | Ford Wagon | 1112 | Metro Private Car | 1926-27 |
| Colyer | H. C. | 29 Burt Street | B.S.A. 1½ H.P. | P 971 | Perth Municipality | 1919 |
| Com Agl. Ser. Engineers | - | Saint George's Terrace, Perth | Case | 4773 | Metro Private Car | 1923-24 |
| Com Agl. Ser. Engineers Ltd | - | Saint George's Terrace, Perth | Gray | 4760 | Metro Private Car | 1923-24 |
| Com Life Assn Co | - | Perpetual Trustee Buildings, Perth | Maxwell | 7722 | Metro Private Car | 1925-26 |
| Com Life Assn Co | - | Perpetual Trustee Buildings, Perth | Maxwell | 7722 | Metro Private Car | 1926-27 |
| Com Life Assurance Co | - | Saint George's Terrace | Maxwell | 11658 | Metro Private Car | 1927-28 |
| Com Life Assurance Co | - | Saint George's Terrace | Chevrolet | 11683 | Metro Private Car | 1927-28 |
| Com. Agl. Scy. Engineers Ltd | - | Saint George's Terrace, Perth | Gray | 4616 | Metro Private Car | 1923-24 |
| Com. Agl. Scy. Engineers Ltd | - | Saint George's Terrace, Perth | Gray | 4617 | Metro Private Car | 1923-24 |
| Com. Agl. Ser. Engineers Ltd | - | Saint George's Terrace, Perth | Gray | 4743 | Metro Private Car | 1923-24 |
| Com. Agl. Ser. Engineers Ltd | - | Saint George's Terrace, Perth | Gray | 4784 | Metro Private Car | 1923-24 |
| Com. Agl. Ser. Engineers Ltd | - | 8 N.S.W. Bank Cham. | Dealers | 2901 | Metro Private Car | 1923-24 |
| Com. Agric. & Service Engineers. | - | 3 Dalgety Chambers | Case | 2018 | Metro Private Car | 1924-25 |
| Com. Life Ass Society | - | Saint George's Terrace, Perth | Studebaker | 5736 | Metro Private Car | 1924-25 |
| Com. Life Assn. Co | - | Perpetual Trustee Buildings, Perth | Maxwell | 7722 | Metro Private Car | 1927-28 |
| Com. Life Assurance Co | - | Saint George's Terrace, Perth | Chevrolet | 11647 | Metro Private Car | 1926-27 |
| Com. Life Assurance Co | - | Saint George's Terrace, Perth | Maxwell | 11658 | Metro Private Car | 1926-27 |
| Com. Life Assurance Co | - | Saint George's Terrace, Perth | Chevrolet | 11683 | Metro Private Car | 1926-27 |
| Com. Life Assurance Society | - | Saint George's Terrace, Perth | Studebaker | 5736 | Metro Private Car | 1925-26 |
| Combley | F. | Meckering | Citroen | ME ● 173 | Meckering Road Board | 1925-26 |
| Combley | F. | Meckering | Citroen | ME ● 173 | Meckering Road Board | 1926-27 |
| Combley | F. | Meckering | Citroen | ME ● 173 | Meckering Road Board | 1927-28 |
| Combley | Fred | Meckering | Buick 23 H.P. | ME ● 12 | Meckering Road Board | 1922-23 |
| Combley | Fred | Meckering | Bucik 23 H.P. | ME ● 12 | Meckering Road Board | 1923-24 |
| Combley | Fred | Meckering | Buick | ME ● 12 | Meckering Road Board | 1924-25 |
| Combs | C. W. | Boyanup | Ford | CP 12 | Capel Road Board | 1923 - 1924 |
| Combs | C. W. | Boyanup | Ford | CP ● 12 | Capel Road Board | 1924-25 |
| Combs | C. W. | Boyanup | Chevrolet | CP ● 12 | Capel Road Board | 1925-26 |
| Combs | C. W. | Boyanup | Chevrolet | CP ● 12 | Capel Road Board | 1926-27 |
| Combs | C. W. | Boyanup | Chevrolet | CP ● 12 | Capel Road Board | 1927-28 |
| Comerford | H. | Cunderdin | Ford Truck | ME ● 297 | Meckering Road Board | 1926-27 |
| Comerford | H. | Cunderdin | Ford Truck | ME ● 297 | Meckering Road Board | 1927-28 |
| Comet Motors | - | Beaufort Street, Perth | Dealers | 20016 | Metro Dealers Car | 1924-25 |
| Comet Motors Ltd | - | 920 Hay Street, Perth | Rugby | 4537 | Metro Private Car | 1923-24 |
| Comet Motors Ltd | - | Beaufort Street | Durant | 6215 | Metro Private Car | 1924-25 |
| Comet Motors Ltd | - | Beaufort Street, Perth | Dealers | 20007 | Metro Dealers Car | 1924-25 |
| Comet Motors Ltd | - | Beaufort Street, Perth | Dealers | 20020 | Metro Dealers Car | 1924-25 |
| Comet Motors Ltd | - | Beaufort Street | Dealers | 20039 | Metro Dealers Car | 1924-25 |
| Comet Motors Ltd | - | Hay Street, Perth | Dealers | 20007 | Metro Dealers Car | 1925-26 |
| Comet Motors Ltd | - | Hay Street, Perth | Dealers | 20020 | Metro Dealers Car | 1925-26 |
| Comet Motors Ltd | - | Hay Street, Perth | Dealers | 20039 | Metro Dealers Car | 1925-26 |
| Comet Motors Ltd | - | Beaufort Street, Perth | Dealers | 20110 | Metro Dealers Car | 1925-26 |
| Comet Motors Ltd | - | Beaufort Street, Perth | Dealers | 20111 | Metro Dealers Car | 1925-26 |
| Comet Motors Ltd | - | Beaufort Street, Perth | Durant | 6215 | Metro Private Car | 1925-26 |
