I never thought I’d get my hands on one of these, but wonders never cease. This is a Singer Automatic Zigzagger which I purchased today:

As sewing-machine technology improved significantly in the postwar years of the mid-1950s, with the the end of rationing (which in the United Kingdom, lasted twice as long as the war itself!), countries like America and the United Kingdom could start producing better and more advanced consumer-goods than ever. One of the new improvements was sewing-machines that could produce decorative zig-zag, slanting stitches, something unheard of before the war, with all prewar machines being ‘straight-stitchers’, performing a standard, straight lockstitch.

These newer, postwar machines worked by having the needlebar jerk back and forth, from left to right as the machine stitched from front to back. The side-to-side motion of the needle and the front-to-back motion of the machine allowed various types of decorative zigzag-stitches to be created. The machines were popular, but still very expensive. And Singer still had thousands of old-fashioned straight-stitch machines leftover from before the War. How to sell these older, increasingly out-of-date but still reliable machines to a public hungry for the newest postwar technology, not some dated, 1920s piece of junk?

Enter the automatic zigzagger.

A wide variety of zigzaggers, just like a wide variety of buttonholers, were produced by Singer, to be sold all over the world. This particular model, the 160990 (which also came in a 160991 variation), was manufactured for the European and British market (and by extension, the British Commonwealth) in Switzerland. It’s fitting that a country long-famed for its expertise in chocolates and watches, should manufacture an attachment of this quality. It’s exposed, it’s bare, it’s naked, it looks half-complete and you’re probably wondering where the rest of it is…but it is all there.

The beauty of this is that it’s very simple. The parts move freely and smoothly and won’t jam or seize up when the machine is in operation. It has a loose-ish feel to it, but that’s important when anything tighter would cause operational problems.

This zigzagger comes with its original cream box:

And it’s original manual:

It also comes with a dog-plate and all the necessary bits and pieces that go along with it. But most importantly, it comes with these:

These steel discs, roughly the size of a penny, are the cams that you insert into the zigzagger before commencing stitching. The cam you insert will determine the type of stitching that the zigzagger will produce. As the zigzagger operates, its arm will move over the ridges on the cams. The length and depth of each ridge determines the length and size of the stitch, and therefore, the pattern left behind by the zigzagger as it moves across the cloth.

They came in sets of five and ten cams (there’s eight there, so this would be a ten-cam set. Two of them are missing) as well as the zigzagger itself having a default cam set into it to produce a standard back-and-forth zigzag stitch.

Zigzaggers like these, with their cams, were simply fastened onto the machine via the presser-foot bar, in-place of the standard presser-foot. The arm or fork on the right of the zigzagger (in the photo above) went over and under the needle-clamp, moving up and down with the needle as the machine operated. These worked with all old-fashioned Singer straight-stitch machines and were very popular. For a couple of dollars more, you’d purchased a hardware upgrade to your machine and it could now compete with those newfangled “slantomatic” Singers that were just coming off the production-line.