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12-26-2020, 11:55 PM | #1 |
Member
Join Date: Sep 2020
Location: Hooper, Utah
Posts: 92
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Speedometer Question
Good evening,
Does anyone know how to interpret the codes stamped on the back of a speedometer housing? These are the numbers I have. All Stewart Warner 1940s. 569F 579X 579P Q9 579R H4 In a nutshell, does 569 decode as something different than 579? Are the 4th digit alpha characters significant? What about the Q9 and H4? Thanks. |
12-27-2020, 08:48 AM | #2 |
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Join Date: May 2010
Location: Coral Springs FL
Posts: 11,014
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Re: Speedometer Question
Might be inspector test stamps.
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12-27-2020, 11:59 AM | #3 |
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Join Date: Sep 2020
Location: Hooper, Utah
Posts: 92
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Re: Speedometer Question
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