I don't think the pattern number is going to make for an easy search. Approximate date (even just the year) of the Workbasket you found it in would be most helpful. And could you tell us what application the butterfly is to be used for? Was it an insertion? I seem to remember a thread butterfly that was used as a corner on a towel. Or was it for something else?

I have more than a hundred Workbaskets, and I'll be happy to look, but I'll need at least the application, I think.

I will have to look also