These movements receive their timing pulse from the DCF77 transmitter on 77.5 KHz in Frankfurt. This time signal can be received in all places where there is good radio long-wave reception.
Note that a casing and dial of metal can adversely affect reception of the time signals.
The movement length is measured over the total length from the exit of the case to the tip including the thread.
11 mm shaft for dial thickness up to 4.6 mm
17 mm shaft for dial thickness up to 11.1 mm