I use Schmetz or Organ 80/12's for piecing on my 301a. I like Microtex best. I use Aurafil 60 wt thread mostly. If I'm doing other sewing I use regular Metler thread and the appropriate needle for the weight thread. It seems to be a very forgiving machine and not that picky about thread. My mom sewed on mine for years and Coats and Clark was probably the best thread she used.
Last edited by cashs_mom; 03-24-2018 at 05:34 PM.