Good Morning Don. I know that Mettler makes a variety of thread. I am looking at a 547 yards of Mettler silk-finish thread but the Art should be 104 and the the next number is the color. On the bottom size, it says No 50 which is the weight. JAF use to sell this thread online only and they stopped selling it over a year ago. So I am surprised that your local JAF is selling it. I have used this thread exclusively since the early 90s when I was told that is the thread I should use on my Bernina 1530.
Last edited by ManiacQuilter2; 08-26-2016 at 09:41 AM.
Reason: Add photo