I don’t know who the original supplier was; however, I pulled 5 identical switches I had within arm’s reach - 2 had the same part number, 2 others had different numbers and another had no part number but did say “Made in USA”. The ones with part numbers also said MOPAR or had the Pentastar. I’d say the one with no part number is aftermarket. I’d be willing to be all work as they all came out of running cars with lights that worked.
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