Hello, Will ~
You have one of the last and best Easy Spindriers before the changeover, which precipitated a complete redesign in the the transmission and the pump. The dead giveaway is the elegant esthetics of the double dip on the tub lip making the tub look so damn cool. I once had the very one in your possession, but gave it to an uncle whose water well situation required an Easy with its exquisite water inlet filtering system.
Over the years, from the late 40's onward, Easy had four distinct models that repeated throughout all production sequences:
First, BOL A ~ no faucets, no valve on the spinner drain, but a valve on the drain hose to retain water in the spinner, if desired;
First, BOL B ~ no faucets, but a valve control for the spinner drain;
Second A ~ A fill faucet with no valve on the spinner, but a valve on the drain hose, etc;
Second B ~ a fill faucet with a valve control for the spinner;
Third, A ~ 2 faucets, one for drain and suds; the other for fill and rinse, but no control for the spinner drain, but a valve on the faucet to hold water in the spinner, like the one Shannon landed;
Third B ~ 2 faucets and a control for the spinner drain;
Fourth, TOL ~ just like 3B, but with two speeds, Normal and Gentle.
The advantage of the valve control models was convenience in that it's easier to pull a lever than to work a valve on a faucet or hose, but more than that for die-hards like us, is that draining the wash tub is much faster when the rinse half of the pump is closed by a control. The air being sucked into the pump through the spinner drain reduces the water volume in the pump by about one-half. You can see the slower draining in Shannon's video whose machine lacks a control lever for the spinner. When the rinse/spinner drain is closed, the washtub water gushes out in spades. You can experiment wash tub draining with your machine by experimenting draining the tub with the spinner drain open or closed. Dramatic and notable.
Have seen all of these models in my long life, and with the spin drain variables, there were actually seven different machines, but I would never be able to match them with model numbers which were not constant over time.
Ask, away. Having Used Easies for decades, including during childhood, and having repaired their double port pump once but probably could not do that again, and currently owning and using 4 different models, I know a bit about them. Easies are my pride and joy; I love them !