The Model 105 had a Hoover-built motor (note the tag on the FRONT of the motor), it also had the switch on the left side of the machine, as well as a handle grip. The tag on the front of the motor was only on 105. 102 had a Robins and Meyers motor with tag on top in brass, 105 had the tag on front, model 541 had NO tag on front (tag on back of motor).
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