The Singer model 221 or Featherweight was designed to be portable.
221 Featherweight Front
The Singer 221 was portable and stitched a wonderful straight stitch.
221 Featherweight Side
Notice the flip up bed extension on the Singer 221 sewing machine designed for compactness when carrying the machine in its case.
222K Featherweight Side
The bed on the Singer 222 model Featherwight sewing machine can be removed to provide an arm for sewing sleeves and cuffs.
Singer 222K Featherweight Front
The Singer 222 model Featherweight was a free arm sewing machine which allowed for stitching small garment areas.