I was able to find this photo on the internet. If your machine looks something like this http://www.worthpoint.com/worthopedia/strong-vintage-kenmore-sewing-machine
Kenmore sewing machine in cabinet model 117 305 Collectors Weekly
Photo gallery Stitch in Time Must Liquidate EstateSales org
then it most likely has zig-zag. There are a lot of dials and levers on this machine. Most straight stitch machines have only one or two. One dial/lever with numbers from 0-4 or 5 would be the stitch length. The other dial/lever with numbers from 0-4 or 5 would be stitch width, which would make a zig-zag stitch.
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I was able to find this photo on the internet. If your machine looks something like this
http://www.worthpoint.com/worthopedia/strong-vintage-kenmore-sewing-machine
Kenmore sewing machine in cabinet model 117 305 Collectors Weekly
Photo gallery Stitch in Time Must Liquidate EstateSales org
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=25&ved=0ahUKEwjXk5Gy3ZTMAhXhyIMKHaaSA_w4FBAWCEEwBA&url=http%3A%2F%2Fwww.searsarchives.com%2Fhistory%2Ffiles%2Fsewing_id.pdf&usg=AFQjCNEavJEwfhMVnix2pT0kwej_RSZ33A&cad=rja
then it most likely has zig-zag. There are a lot of dials and levers on this machine. Most straight stitch machines have only one or two. One dial/lever with numbers from 0-4 or 5 would be the stitch length. The other dial/lever with numbers from 0-4 or 5 would be stitch width, which would make a zig-zag stitch.
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