Well, my new buttonhole attachment arrived - and it's beautiful! To be fair, it's very like the other one I have, which is the Professional, which says on the box, for slant shank and zig zag machines.
The new one, the Golden Panorama, has not got information on the box, but I believe (I may be wrong here - I was once:)), that the Golden Panorama is the 670g sewing machine.
I haven't had much chance to compare the two, just a few minutes this morning, and the only difference I can see, is the feed dog cover.
I'm going to investigate further, to see if it would be possible to use it on a low shank machine.
I love the other buttonholers I have, but this one takes the guesswork out of buttonholing, I just lift the flap, drop another template in, and away we go.
Jessie