The Rolex Caliber 3135>>>>>>

[jholbrook]

Hi, nice article, for me there were some new information in it.

Where exactly are the bridges which are rhodium platet - where I made the red circles?

I believe the areas you circled are rhodium plated. Do you believe otherwise?

And why is is the plain sleeve bearing of the rotor a weakness - I thought it's a jewel bearing and that is the reason why it is so silent - I thought that is a strength?

The plain sleeve bearing (which is not the key to the silent Perpetual winding system) must be kept well lubricated - as long as you do that, you won't have any problems. Most manufacturers (including Rolex themselves in the case of the newer caliber 4130) use ball bearings in the winding rotor system, because ball bearings are less dependent on lubrication.