Filter Queen
I believe that machine is a 33 unstead of a 31 ,it probably got the wrong model plate installed, a model 31 is 1 speed, 33 is 2 speed , also the 31 was only made in 2 tone , the 33 was a solid color, finally the cord winder was only for model 33 not 31 , hope this info helps a little,im not a expert on F.Q. but have picked up some good identification tips.