Congratulations on remembering it...I did the same thing recently. My hubby's grandmothers FW sat in the basement for the last 15 years. After attending a quilt class and seeing other ladies using their machines...I thought GEESH I have one of those.
I uncovered her - wiped gently and oiled it up and she purrs so quietly.
There's lots of site about the 221s - good luck!