There's a whole series of 50-9xx dust collectors all of which seem to look pretty much the same; the different models denote motor combinations; horsepower, 1 or 3 phase, etc. Norm's is a 5 hp, 1 ph unit.
Since it's usually out of sight, there's no point in trying to chronicle appearances. Just assume that if a floor machine is turned on, the '903 is running.
Appearances: Episodes almost all of them since 1991.
