When were the new vinyl hoses (that are currently used) introduced--year and machine? Did the plastic bodied machines that were sold at the same time as the Model 1521s have the same hoses as them, or did they use a different kind? I realize that some, like the Model 2100s, would have had electric hoses and some, like the L-Es, would have had non-electric ones.
Also, when was the gas pump-style hose introduced?
Also, when was the gas pump-style hose introduced?