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Help with Vintage Singer T&S 648 Bobbin

8 years ago

Hello all,

I am completely new to sewing and got a used Singer Model 648 Special Zig Zag without realizing they are quite finicky. I am trying to thread the bobbin (get it to sew) and can't figure out what I am doing wrong. I can't find any help online and am getting so frustrated :(. Somebody please help me figure this out. The person I bought it from said it needs a bit of tension work, but I can't figure out how to even do that.

Here is a video of me trying to thread the bobbin and start sewing:

Here is the manual for the model:

Thank you all so much!

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