From an engineering standpoint in particular, without factoring in decoration, etc.. do you have a favourite 3 hand automatic movement?
As the Chinese say, "where ever there's strong, there's stronger" The Timex engineering is simply brilliant. It's easy sometimes to forget how superb they were at the bottom of the heap. One of their escapements was a derivative of the chronometer escapement and they manufactured over 3 million of them. If I'm not mistaken many of their 21 jewel escapement were derivatives of the Brocot escapement.
You suspect right: It only looks like. After loosening three screws, it is ready for cleaning and lubricating, and after loosening three further screws, all falls apart, if repairs are necessary....in a pin pallet watch that looks held together by welds and rivets.