Singer 101, 1922 vintage. The stitch length is the nob on the bed of the machine. Notice the pull chain for the light.
The underside - quite different than other Singers of this era
The controller is built into the machine, and the knee bar mounted in the cabinet pushes a rod into the machine to activate it.
And the potted motor on the back
This machine was considered high end and came with an extended set of attachments. I've acquired a hemstitcher with the appropriate plate also.
It came with the darning foot and feed cover. I don't think this would work for quilting though.
And the cabinet specifically designed to house this machine.