@annieeg I have these unmarked feet which I think are low shank - the centre of the screw space is 0.5” from the base of the foot and the needle hole is 0.5” from the back of the foot. The middle two feet are hinged.
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I also have this buttonhole attachment which is marked as being for Viking machines. I’ve never tried it on a machine, but the parts seem to move by hand.
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