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Old 08-12-2014, 12:24 PM
  #4  
Rodney
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Join Date: Oct 2013
Location: Centralia, WA, USA
Posts: 4,890
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Singerco.com has a free download of the manual for a 15-91.
http://www.singerco.com/uploads/down...54a175ca4c.pdf
There's very good instructions on bobbin winding and how to install the bobbin inside.
I hope this helps,
Rodney
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