Thank you ! The washer is practically a time capsule. Yes, this was I think a one off model. Not around too long. I think by 1975 Sears already had a replacement model with the controls moved down onto the panel minus the 2nd rinse knob. According to the Sears catalog, the upper balcony model shows up in the fall/winter of 1974. Love the wash action of the Penta Swirl. in my opinion, this agitator did not deserve the maligning it got.. It is quite an effective agitator even on full loads.