Before we had sewing machines that could stitch out hundreds, maybe even thousands, of decorative stitches, you had to use an attachment to create anything other than a straight stitch. One of these attachments was the two thread embroidery attachment made for Singer sewing machines. While these are cool little machines, it's very hard to find them now. I was fortunate enough to find one mixed in with a lot of Singer attachments and snapped it up right away!