What a find! Fantastic machine, Larry.
Looks very similar, in many ways to my parents 1968 Modern Maid.
The changes that I see:
1.) It looks like the lower wash arm was redesigned with smaller holes (and more holes).
2.) The Tub is white, and on the Modern Maid it was "Robins Egg" blue (according to the Modern Maid owner's manual, this was the name of the color.
3.) There is a third spray arm, on the top, that the Modern Maid did not have.
Other than these, and of course a different control panel, it seems few changes were made in 15 years. Same pump, same motor, same mount for the middle wash arm.
Same cycle progression WRRWRR as the MM.
By the way, a little off topic, what year did Sears stop using the Roto-Rack?
My guess (but could be wrong) is was because of limiting total capacity for the machine and also limiting pot sizes that could be used in the upper rack. I remember my sister and brotherin-law's roto-rack. If a heavy pan were put in the upper rack, sometimes it would make the rack go out of balance as it spun with some loud ensuing banging noises. A panhandle, inadvertently stuck out or up too far, resulted in no rack spin.(which equaled dirty dishes in roto-rack when cycle was done) However, they liked it well, as a dishwasher.
Could it be that too many customer complaints, because of these deficiencies, resulted in Sears asking for their machines to be designed with standard upper racks?
I imagine the scrubability of your model, Larry, was greater due to the redesign of the wash arms with the smaller holes. Smaller holes=greater force.
Looks very similar, in many ways to my parents 1968 Modern Maid.
The changes that I see:
1.) It looks like the lower wash arm was redesigned with smaller holes (and more holes).
2.) The Tub is white, and on the Modern Maid it was "Robins Egg" blue (according to the Modern Maid owner's manual, this was the name of the color.
3.) There is a third spray arm, on the top, that the Modern Maid did not have.
Other than these, and of course a different control panel, it seems few changes were made in 15 years. Same pump, same motor, same mount for the middle wash arm.
Same cycle progression WRRWRR as the MM.
By the way, a little off topic, what year did Sears stop using the Roto-Rack?
My guess (but could be wrong) is was because of limiting total capacity for the machine and also limiting pot sizes that could be used in the upper rack. I remember my sister and brotherin-law's roto-rack. If a heavy pan were put in the upper rack, sometimes it would make the rack go out of balance as it spun with some loud ensuing banging noises. A panhandle, inadvertently stuck out or up too far, resulted in no rack spin.(which equaled dirty dishes in roto-rack when cycle was done) However, they liked it well, as a dishwasher.
Could it be that too many customer complaints, because of these deficiencies, resulted in Sears asking for their machines to be designed with standard upper racks?
I imagine the scrubability of your model, Larry, was greater due to the redesign of the wash arms with the smaller holes. Smaller holes=greater force.