Rhonda

I have a 1950's Singer that I have had for 30 yrs. I don't really know alot about it tho. I am asked what I have and I really don't have that answer. So If anyone can pin this down for me I would appreciate it.
It's been my workhorse for years now and I prefer it to any other.

What I really want to know is what kind of foot is on it. I have used nothing but this foot and when I write tutorials I don't really know how to refer to the foot and it's size.\

I don't know if it is a featherweight machine or one of the 15s etc. Any help would be appreciated.