Kenmore 84

That's quite a bit older (ca. 1956) than my Kenmore Zig-Zag (1975).
I think they got quite a bit better by the 70's.
There are some U-tubes of the 84 on Google that might be worth looking at.
The Zig-Zag is much better IMO than the modern plastic ones, and Sears Repair Centers will still repair and maintain it. You might call Sears repair to see if this is true of the older model 84.

Thanks Samuel I'll check that out! When I spoke with the lady today she said her grandfather gave it to her in the 70's I think. She doesn't know how to sew so I'll have to see if it works.

I'm still looking for those old metal singers.

I see you're from Tamworth area, that's a nice area. I'm from Springfield NH, moved out here a few years ago.

I only have one kenmore and it is a stylist 86 from the fifties. It just falls short of being able to sew through plate steel. The other nice feature, and I don't know if the 84 is the same is the forward/reverse is a lever instead of a momentary push button. I find this quite handy when needing both hands for reverse sewing situations. My sewing shop repair guy said that the old kenmores as far as durability really can't be beat short of a commercial machine. Thirty bucks for that kind of machine is well worth it.