I got around to taking some pictures tonight; will process & post in a day or two.
Yes, the timed spin is a useful feature, as is the timed wash. Simple mechanical timers that wind down with the familiar ticking sound, the wash-timer having a periodic tick-tock as the power-reversing relay operates to control the agitator. No computer controls to get out of order.
Bpetersxx, thanks for the pictures; I've got some of the internal workings but yours are better for detail. For example now I see how that clever spinner braking mechanism works; it's a pincher that grabs a disc on the shaft.
Chribeau, thanks for the heads'up on the pump during the spin cycle. The way I achieve that result is by quickly switching the drain selector to "drain" and then back to "wash/rinse." Sometimes it catches on the first try, sometimes it takes a couple of tries. I also use that method to be sure the pump is running during overflow rinse, in case the overflow valve doesn't trip on its own.