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ACI Plates

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  • ACI Plates

    Does anyone know where I can find info on SP's practices when it came to ACI (Automatic Car Identification) plates? I know that they started sometime around 1968, but what about locomotives. Did that start in the late 60's too, or did that start after 1970 when pool power got into full swing? Just trying to do a little more to define my time period!
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