This is the Singer 160847 Multiple Slotted Binder, which is one of those attachments which seem to be fairly common in the US, where it was made and where Featherweight fans seem to be particularly drawn to it.  Over here it’s not exactly rare in the sense that the Penguin is, but it’s certainly not a common attachment.  That’s why we were chuffed to get hold of this rather nice one, also shown here posing for a picture on Elsie’s 221K …

Truth is though, that’s likely to be the only time it gets fitted to a presser bar in this house, because if and when Elsie uses bias binding, it’s ready-made and it’s one width, for which she uses the plain vanilla binder feet.  So, interesting though this attachment undoubtedly is, it’s just not going to get used here for the clever stuff it’ll do like applying two different bindings at once, so we’ve decided that it deserves to go to somebody who will do amazing things with it.  That’s why I’ve just listed it on the ever-changing Accessories for sale page …