The 301 was Singer's first slant needle machine. Its design was also the first sign that Singer was moving away from the Classic look.
Click here if you want more information on this model and other Transitional sewing machines models.
The 301A is the same model as the 301 - it was just built in a different factory. The 301A was constructed in the Anderson, South Carolina factory.
The 401 was a the first Singer that could sew decorative stitches by changing the settings on the machine.
Click here if you want more information on this machine and other Transitional sewing machine models.
The 500 was a capable machine that could sew a wide range of decorative stitches. Its most notable feature is its "space age" inspired design.