Where/when do the plastic gears start on Singers?
I was totally misinformed. I thought the plastic gears started with something past the early 600s. I knew the 700s had plastic gears and also the later 600s. I just bought a 538, and it has plastic gears. I assumed, incorrectly that the 500s were older than the plastic geared ones. I have a 503, which is supposed to be metal.
How do the less experienced folks know where (number wise) the plastic gears start?
bkay