Okay, I am 66 years old and just starting quilting 2 1/2 years ago. I inherited my grandmother's 1937 Singer which I use weekly. Along with that I got her sewing kit and my mother just past away in January and I got her machine and her sewing kit. Both of them have well over 60-70 wooden spools of thread. I do the tug test and if it holds, I use that thread. I think some of that thread is better than the thread today. It is 100% cotton and I think I have every shade imaginable. Oh, yes, I do buy modern thread but before I do, I check my stash from my mother and grandmother. Thank you, ladies!!!!!