The basic order: four main models~
Model 1~BOL no faucets, no spray cone in spinner, wash drain valve only, spinner drain always on
Model 2~ a fill faucet and a drain hose (some models have a valve on the hose to allow holding water in the spinner, and some have a spray cone in the spinner). Much variety here and in Model 3.
Model 3~two faucets, fill, drain/suds, inlet filter, no drain control for the spinner but a valve on the drain faucet to hold water in the spinner (WE'VE JUST SEEN THIS) and when I figure out which thread, I'll link it. Spray cone in the spinner
Model 4~TOL two faucets, inlet filter, valves and controls for both washtub and spinner, Spiralator filter. Spray cone in the spinner.
The looks of the timer evolved over the years, and most machines had them, even BOL's in some years, but the timer does NOT shut the machine off in any model of any year.
After you get used to these you can figure out the features by looking at the controls. Ralph's scanned model does not have a valve for the spinner drain. During those years when broomstick controls were used for agitation and spin, some machines controlled the spinner drain valve right from the stick, CLOSED OPEN SPIN. Other models had two handles below the broom sticks, one for each drain valve. If you see a machine with a vertical slider control under the timer that is the wash tub drain valve control.
Some time in the late 50's all controls morphed into levers on a clock face with 3 or 4 levers depending. The non TOL's had no lever for the spinner drain. Stayed on all the time, but then again some of these came with the same faucet valve seen on the old machines so you could hold water in the spinner.
Some day, we'll have this down to a science they way we do for the Frigidiares, Whirlpools, Kenmores, and Maytags. What continues to surprise is the astonishing variety of models that keep popping up, almost like Kenmores. We simply haven't seen them all. "There out there!" as Mulder would say to Sculley.
Hope this helps, Arbi.