This is Ruthie, she was manufactured in Japan and rescued from a premature trip to the dump!
She sews fancy zigzag stitches with built in cams. The cams are selected by using a stitch selector dial and switching the stitch width knob to "F" once the stitch is selected the stitch width is moved back to "O". She has an automatic four-step button holer on the reverse dial.
When I brought her home, she needed a good cleaning, was starved for oil, as well as missing her manual and accessories. After cleaning and oiling I tried to sew with it. The stitch selector dial would not turn at all. At first Ruthie would not sew either, because the bobbin thread was completely pulled through to the top side. After fiddling quite a while with the top thread tension, there was still no improvement on the stitch quality. The bobbin tension screw was the problem, it was so loose it could have fallen out on its own. A couple of twists on the little screw and Ruthie was sewing precise lovely stitches. The bobbin winder would not turn either, so I completely disassembled, cleaned, oiled and reassembled it. Now it works perfectly. A hair-blower and sewing machine oil were used to unfreeze the stitch selector dial. The oil goes over the froze up metal parts inside the machine, then heat was applied to get the metal really hot. As the metal expands the oil penetrates the ceased up parts then like magic the moving parts are free. I had to replace the bobbin winder tire and the light bulb. Look at Ruthie's stitches!
After I phoned the lady who gave me this machine she dropped off the manual and accessories.
Ruthie uses high shank feet, standard class 15 metal bobins and regular sewing machine needles. There are two buttons control the feed dogs for free motion quilting and embroidery.
For more vintage treasures please head over to Colorado Lady's blog.