Hello Bill I have a 16-141 Singer as well, love this old machine Pops sewed on it for many years, I’m looking for needles for it , I had found some 16x64 #23 this is what was written on the sleeve, I am looking for a #20 size ,most source I’m talking act as if I’m asking for hens teeth, I’m not familiar enough to know the needle sizing terminology. Do you or any one know a source.