The Two Spools Sewing machine. The last patent date for both is Sept 1913. First one is the National Two Spools and the second one is the Eldredge Two Spools. The second spool sits in a " spool can" instead of a bobbin.
National H23907
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Eldredge H12618, winding a spool on winder
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Spool Can to hold spool of thread.
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Can spool
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