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Bus
Before 1924 buses were registered as commercial vehicles. In 1924 Omnibus plates were issued with an "O" prefix. Then in 1926 a separate category of "H" prefix bus plates were issued. See above. From 1926 to 1929 those vehicles that were required to have a certificate of convenience were designated by an "O" prefix. In 1929 a new law was passed requiring all buses to have this certificate and thereby ending the "H" prefix plate. Following this all common carrier and for hire buses used the "O" prefix until 1968 when the "BA" prefix came into use.
Thank you to Jake Eckenrode and Eric Tanner for this information.
1940 - 1949
1940
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Observed serial range: O1 to O714 - Plates measure: O1 - O999: 6" x 10" O1000+: 6" x 12" |
 (6" x 10") From Jerry McCoy  (6" x 12") From Bill Krellner |
Not offered on this format |  |
1941
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Observed serial range: O1 to O2152 - Plates measure: O1 - O999: 6" x 10" O1000+: 6" x 12" |
(6" x 10")  (6" x 12") From John Willard |
Not offered on this format | |
1942
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Observed serial range: O1 to O8060 - Plates measure: O1 - O999: 6" x 10" O1000+: 6" x 12" |
(6" x 10")  (6" x 12") From John Willard |
Not offered on this format | |
1943
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Observed serial range: O1 to O7589 - Tabs used instead of a new annual plate in order to conserve steel for the war effort - Tabs measure 1 7/8" x 2 1/8" |
 From eBay |
Not offered on this format | |
1944
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Observed serial range: O1 to O7917 - Plates measure 6" x 12" |
 From Jeff Francis |
Not offered on this format | |
1945
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Observed serial range: O1 to O8868 - Plates measure 6" x 11" |
 From Clayton Moore |
Not offered on this format | |
1946
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Serial formats: O1 - O9999 OA000 - OA999 Observed high: OA629 - Plates measure 6" x 11" |
 From unknown  From Jeff Francis |
Not offered on this format | |
1947
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Serial formats: O1 - O9999 OA000 - OA999 Observed high: OC078 - Plates measure 6" x 11" |
 From John Willard |
Not offered on this format | |
1948
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Serial formats: O1 - O9999 OA000 - OA999 Observed high: OC641 - Plates measure 6" x 11" |
 From Kenn Grim  From Jerry McCoy |
Not offered on this format | |
1949
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
- Observed serial range: O1 to O8347 - Plates measure 6" x 11" |
 From Jerry McCoy |
Not offered on this format | |