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Tractor
Tractor plates were first issued in 1914, and used an E prefix, standing for Engine until 1927, from 1928 to 1933 a TE prefix, meaning Traction Engine, was used. Then the prefix was removed and the word TRACTOR was used as the legend until the discontinuation of tractor plates after 1983. Both the 1971 and 1977 bases used the prefix TR. In 1984 tractor plates were replaced by two different types. If the tractor was used for industrial purposes, it received a Special Mobile Equipment (SME) plate. If the tractor was used for agriculture, the vehicle was issued an Implement of Husbandry (IMP) plate. There has been a proliferation of SME plates and profound scarcity of IMP plates. As of the end of 2011 there were 24,367 SME plates in use and 216 IMP plates.
1950 - 1964
1950
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 0001 - 9999 A000 - Z999 Observed high: K156 All plates measure 6" x 11" Manufactured in Pennsylvania prisons Issued in singles Colors: gold on dark blue |
 From Tim Gierschick  From Worthpoint |
Not offered on this format | Not offered on this format |
1951
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 0001 - 9999 A000 - Z999 Observed high: S896 All plates measure 6" x 11" Manufactured in Pennsylvania prisons Issued in singles Colors: dark blue on gold |
 From John McDevitt  From Clayton Moore |
Not offered on this format | Not offered on this format |
1952
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 0001 - 9999 A000 - Z999 Observed high: S354 All plates measure 6" x 11" Manufactured in Pennsylvania prisons Issued in singles Colors: gold on dark blue |
 From Clayton Moore  From Tim Gierschick |
Not offered on this format | Not offered on this format |
|
OTHER INFORMATION Registration card for 1952 Tractor plate number 2273 |
 From Tim Gierschick |
1953
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 0001 - 9999 A000 - Z999 Observed high: R736 All plates measure 6" x 10 1/4" Manufactured in Pennsylvania prisons Issued in singles Colors: dark blue on gold |
 From Clayton Moore  From Ed Burr |
Not offered on this format | Not offered on this format |
1954
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 0001 - 9999 A000 - Z999 Observed high: U521 All plates measure 6" x 10 1/4" Manufactured in Pennsylvania prisons Issued in singles Colors: gold on dark blue |
 From Tim Gierschick  From Clayton Moore |
Not offered on this format | Not offered on this format |
1955
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 0001 - 9999 A000 - Z999 Observed high: U609 All plates measure 6" x 10 1/4" Manufactured in Pennsylvania prisons Issued in singles Colors: dark blue on gold |
 From John McDevitt  From Worthpoint |
Not offered on this format | Not offered on this format |
1956
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 0001 - 9999 A000 - Z999 Observed high: V847 All plates measure 6" x 12", the national standard implemented this year Manufactured in Pennsylvania prisons Issued in singles Colors: gold on dark blue |
 From Tim Gierschick  From Clayton Moore |
Not offered on this format | Not offered on this format |
1957
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 100000 - 136385 All plates measure 6" x 12" Manufactured in Pennsylvania prisons Issued in singles Colors: dark blue on gold |
 From Clayton Moore |
Not offered on this format | Not offered on this format |
1958 - 1964
| Notes | Number Plate | Personalized Plate | Sample Plate |
|
Observed serial range: 100-000 - 131-021 (tab slot) 132-679 - 150-023 (no tab slot) Early plates had a tab slot at upper-right. The original plan was to use metal tabs for revalidation but by the time adhesive paper stickers were decided on, a batch of plates had already been made with the tab slot. All plates measure 6" x 12" Manufactured in Pennsylvania prisons Issued in singles Colors: gold on dark blue |
 (Tab slot) From Clayton Moore  (No tab slot) From Worthpoint |
Not offered on this format |  From Paul Bagnarol |