Three DIY within were to procure unable or unwilling this component with 3x external threads in 1/2 inch. Does not seem to pay off. Dear sell a new shower ..
After ordering here at Amazon, the valve was within two days with me. The price I found fair. Feels solid and high-quality as the old. Except for the plastic cap on the rotary handle everything is made of chromed metal. I then of course immediately installed the valve. Separates cleanly. Switching is now possible even while taking a shower. Before the water had to be turned off because it was (even with pressure and pull knob) can not be operated by the high water pressure of the old diverter. At this Amatur the knob to toggle. Through the notch that is more easily when wet, as grippy. There are two outputs can be controlled separately. Both operate at the same time does not work for me but also not of interest.
The customer service is exemplary of the seller. The valve was a note in with fixed and mobile number, also the e-mail address. He seems serious efforts to eliminate the possibly occurring problems and to the satisfaction of its customers.
Let's hope that is only needed at all. Thanks anyway!