Looks like a cool neckline treatment to me. Brilliant, as usual Kenneth.
k

I can hardly wait for the article to appear. I love seeing all kinds of sewing spaces. Small space, large space. I get ideas from all of them.
My MAJOR problem and one I hope to see a solution for is STORING FABRIC! Dressmaking fabric. There are a ton of solutions out there for quilting fabric, but we are talking major yardage here and limited space.

I have two dedicated space across the hall from each other. One I call my cutting room which has a large cutting surface in the middle of the room and floor to ceiling shelves for books etc.

Room across the hall has lots of windows and is where the sewing machinse reside at one end and computer at the other.

I would love neat and tidy and a place for everything, but long narrow spaces are hard to deal with.

I'm so anxious for this article to appear.

Looks like a bias tape maker for a coverstitch machine to me.
k

I like your dress. I love to sew with and wear linen. It looks very nice.