Whenever I visit the Temple St night market in Hong Kong there's always a tiny table or two with a shady looking guy sitting on a cheap folding chair and a binder full of photographs of "AAA Rolex" watches. The ADs could save money on their lease space and electricity by moving to this model for the
Usually folks change watches or take off watches altogether during the weekend. With the longer PR you can take off the watch off on Friday and then put it back on again on Monday and it will still be running with the precision undisturbed. No need to wind or set the watch again.