Kenmore Rotary model: 117-812 mechanical sewing machine. It is a vintage model from Sears, Roebuck and Co.  I have put on new electrical wire from the wall plug to the sewing machine.  The whole inside of the sewing machine and motor needs to be re-wired. It still has the original cotton wiring.  When you turn the hand crank all the mechanicals work perfectly!  It still has the brackets to mount it onto a hide away sewing machine table.