That was something I hadn't thought about when I bought it. I decided to put it to the test and see what was going on. Luckily I have one if these see through automatic watches, so I put it on the machine to check things out. What I found was, due to the myriad of contorsion the watch goes through, the rotor fell in both directions. It did have a slight bias for the weight to turn in a clockwise direction as viewed through the "front" of the watch. This was when the machine was rotating in a clockwise direction. Another thing at I discovered, the machine does not always run clockwise when switched on, sometimes it goes anti-clockwise. When thIs happens the watch was observed to have the same bias when winding as it did when the machine was running anti-clockwise.As promised here's photo if the drive gears and circlip. It definitely isn't the best quality, but I checked all the clips for proper location and tightness, and all seemed OK. So far "for the money" I'm very happy with it. It's run for about forty eight hours so far without any problem, but if it does start falling appart I'll let you know.