Okay, I know there is the featherweight, a 3/4 size machine and a full-size machine...are there actual measurements that would help me determine whether something is a 3/4 or a full size? Or are "we" just eyeballing it?
Regarding Singers: the main difference between a Singer 15 and a Singer 99 is where the tension knob is located, right? Is the Singer 201 a 3/4 size? If not, what is the difference between a 99 and a 201? Oh these little details!
Last question: What is the difference between a 221 and a 221-1? Anyone?