when I strapped two watches to a test monkey
, OK I didn't really have a test monkey but I used a test dummy instead, here is what I found as I looked at the dummy:
The dummy's arms were straight forward like grasping a steering wheel Italian-style. I stood outside the car looking through a window (left-hand drive for US readers)
The Lange watch on the left wrist had its crown left and the Rolex watch on the right wrist had its crown right from my viewpoint. When I walked to the opposite window, the crown positions were switched but in reality, the dummy never moved - I'm sure he was still
Thus as far as vertical gravity forces were concerned, there was no difference between crown left and crown right for the watches....