Originally Posted by thepolyparrot
If it's from the 40's or 50's, you're not going to stress it - unless it's a Featherweight.
I will cross my fingers that you have a model 15 - a just-about-perfect FMQ machine. :)
I completely agree. The 15-91 is a wonderful machine for piecing and FMQ. I have 3 of them - in case the one I am using decides it needs a spa day. Heavy little suckers, though!
If it is a 201 or a Slant -O-Matic like a 401, 403, 404, 500 or 503 it will be great for piecing but not so great for FMQ because the bobbin is horizontal which makes the thread path turn a corner. On the Slants, along with the drop in bobbin, they have a pop-up needle plate instead of drop feed dogs.