I love the old Singers, they sew with no complaining. Its unfortunate that the only thing left of the Singer company is the name, the ones made today are of poor quality and don't live up to the name.
The youngest Singer I own is from 1968, only some of the outer parts are plastic, everything else is all metal. My oldest Singer is from 1923. I use all of my machines.
I have 3 featherweights, 2 are black & 1 is tan. I have 3 Singer treadles: 1937 201,1949 15-90 and 237, soon a Singer 66-18 with bad wiring will become a treadle machine.
I have modern machines will all the bells and whistles, when I want decorative stitches.