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This unique device is an antique Sangamo Ampere Hour Meter Model MS manufactured by the Sangamo Electric Company in Springfield, Illinois, during the 1910s to early 1920s. Unlike standard house meters that measure total kilowatt-hours of alternating current (AC), this electromechanical meter specifically measured ampere-hoursto track the state of charge in direct current (DC) battery systems.
This specific model was widely utilized to track the battery levels of early 20th-century electric vehicles (such as Baker or Detroit Electrics) and Delco/Lalley rural farm lighting systems.
The face features an integrated status gauge indicating "Charge" and "Discharge," helping early electric vehicle owners see exactly how much juice was entering or leaving their vehicle's battery packs.
What you see in the pictures is what you get. Due to the light and screen setting difference, the item's color may be slightly different from the pictures.
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