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Model 99k13 Gallery
![](p/litopborder.png)
![](p/libottomborder.png)
![](j/gallery-99k13-hook.jpg)
Closeup of hook and bobbin on 1922 Singer model 99k13. The red felt
isn't lint; it's a wick to keep the hook lubricated, reducing how
often the hook needs to be oiled. This model also has a bobbin-case
thumb release. The earliest 99s required disassembling the bobbin
case retainer to remove the mobbin case.