I have a service catalog from 11/78 and they show this as a WS-9B or 9G (both without the window). Apparently the "B" models and "G" models were made in the same year, the only difference I can find is the wiring diagram on the "G" is in the console in an envelope as opposed to pasted on the front of the tub. Also, the WS-9B/G is identical to the Custom Imperial WCIB/WCIG with the different graphics. The WEG "Holy Grail" also uses this same font on the "Frigidaire", as well as the logo on the "Tech-Talk" service manuals back to at least 1977. On a side note I used a piece of rigid insulation from inside a refrigerator door, cut to exact size, on the inside of my 1-18 front panel, and you can barely hear it run other than the pulsating wash action.....