Olympia-Silverado
Top trim--As often happens we're both right.Olympia,which was the official vac of the 80 winter olympics,had top and smaller rear wheels of Super J.Later changed to bigger rear wheels and top with easier to carry front handle.Also motor was improved with bars at rear to reduce vibration. ---floor-a-matic-My blue cordwinder was good on outside,bad on inside.I should have others.As my personal computer went from bad to worse you could lick stamp or dial phone,423-543-7900.---Eyebrow--As one of changes on DJ was thicker side bumpers an extention was added above cord grommet to reduce cord rubbing bumper from being pulled up instead of outward.When closeout reduced price Silverados were made they used new molds but grey color part of course.Other way to see if Silverado has DJ motor,aside from it running and sounding bad,is to remove bag and see if there is a space between bag housing and front of motor.More than 1205 or Olympia for example.