The 24 inch whirlpool machines were mainly made for space saving but they also use them in the lowest cost machines because of course they were cheaper to build.
Sudssavers were available from the beginning of belt Drive machines till the end, but it was only on very few models toward the end. They came out with an ad on Sun saver kit for direct drive machines, but it wasn’t very successful so after about five years, it came back with a few models with the built-in sun saver on the direct drive machines.
We have a 1966 24 inch GE filter flow washer, it’s a fully featured two Speed model with mini basket and a fluorescent console light, I was told by a GE rep many years ago that they mainly sold the 24 inch models in the New York area, GE also sold a 24 inch filter flow machine in the 80s and 90s. It came from Venezuela. it was a regular filter flow machine except that it had a removable front panel and didn’t have the cardboard back panel. It was built like the coin machine machines here in the US the filter flow water came out at the 7 o’clock position because the motor and pump were in the front of the machine.
John L