Studebaker Series
| US6 U1 SS | US6 U1c SS |
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| US6 U1c TC | US6 U2c ET |
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| US6 U2c SS | US6 U2c TC |
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| US6 U3c MT | US6 U3c SS |
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| US6 U3c TC | US6 U4c |
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| US6 U4c ET | US6 U4c FT |
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| US6 U4c SS | US6 U4c TC |
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| US6 U4c TC | US6 U4o TC |
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| US6 U5c FT | |
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