Which machine sewed which stitches?
Can you tell - just by looking - what machine sewed which straight stitches?
For example, are the straight stitches from a new, top of the line, Bernina much nicer than the stitches from a low-end Brother or Singer purchased from a "big-box" store.
All of my machines are at least 30 years old - so if there have been major changes in what the straight stitches look like, I am not aware of them.