that 401 is a beauty- I have one which I purchased new
in 1960 $350.00- it stills works like a dream! Several different repairmen who service it over the years- wanted to buy it from me! This machine made many of my clothes, clother for 6 children and 6 grandchildren plus lots of quilts, curtins, sllipcovers, etc.
It does a perfect satin stitch for machine applique.
I hope this brings you lots of enjoyment too!
Evelyn