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The "A" reference in Singer's model numbers pertain to the location of manufacture. For most models, A = Anderson, South Carolina USA. For the 500 machine most were made in Elizabethport, NJ including the "A's" The only difference between a 500 and 500A or 400 and 400A or 301 and 301A, etc. is that the "A" denotes manufacturing plant, whether Anderson, SC or elsewhere.

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16y ago

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