Dang. Nice!
My neighbor growing up had a treadle setup like that.
This one is also a model 15 but with the electric motor. Did a bunch of repairs on it a couple years back but haven't really used it since. Used to have family or friends that would show me how to set it up, etc.
The story on mine is that it came from one of my grandmothers. I think the electric was factory option late in the production years.
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My coffee got cold in the time it took to put some threead on the bobbin.
WTH I'm learning.
I'd gladly pay someone to do sewing and stuff.