After a lot of research to find out what the Greiss attachment actually was (a lot of people said a buttonholer but it turned out to be a Zig-Zag), my wife posted this Model 120 for sale on Craigslist tonight. I thought this group might be interested in context of the age of the machine and relative obscurity of the attachment. We mean it when we say "best offer" ..!
Sorry to be the bearer of bad tidings, but most of these were junked a few years after they were sold, back around 1957. They were made by a company called New Process Gear, which at that time, was a division of Chrysler. They had nylon/plastic bearings that swell as soon as it gets the least bit humid, and cause all sorts of problems. I found one in a thrift a few years back for $8, and should have left it there. You might do better by selling the attachments separately from the machine.
-Irene
And it IS a buttonhole attachment. That's what those cams do - go in the hole and form buttonholes. I have one that works in a very similar way, made by Singer. They were made by several companies, in their millions. The all metal ones with the cast metal cams seem to work better that the ones with plastic gears and/or cams.
It has buttonhole templates in the picture, but the attachment itself is one of those zigzag attachments that takes the small, flat metal disk that resembles the blade for a circular saw - in miniature. I have one here for a Kenmore, one for a White, and a couple for Singer machines. They're much smaller than the buttonhole attachment, and much smaller than Singer's zigzag attachment that takes the heavy cams (color-coded on top for sets.)
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