Originally Posted by
Macybaby
Those two are the shirr plate and underbraider. To use, you remove the front slide on a long bobbin machine and put one in place. They are machine specific. I have lots of them made by Griest - they are part of the attachment set.
Here are a few just to give you an idea
And a National long bobbin set
What I have are two like the one immediately above the piece of paper that says "National 3". One plate is about 1/2" wider and longer than the other. There are two tuckers in this bag also, one looks like the one with the National 3 collection. The other tucker has a spiral spring and a few other small differences, both Greist. Thank you for the photos and explanations.