These are the fixtures used in Schlieren elevators.
1950s to 1980s
These are small round white plastic which lights up by bulb, and functions as car floor position indicator as there is no floor indicator inside the car, making it look very similar like Mitsubishi elevator fixtures in the 1960s. However, they do not lights up when they are pressed.
Some Schlieren elevators also have illuminating numbers next to the floor buttons which include floor indicator inside the car.
Hall floor indicators
These analog hall floor indicators are normally like in 1960s Mitsubishi in Hong Kong. In the 1970s when Schlieren began using automatic doors, there is an analog floor counter with illuminating numbers shown over a black background display.
Most Schlieren elevators installed in the 1950s-1960s are using manual folding doors. In Hong Kong, most of them have scissor gate inside the car for safety reason.
Some older Schlieren elevators in Switzerland that have been modernized in the 1990s and 2000s had their fixtures replaced with either Schindler (M or D-Line) or third party fixtures. In Hong Kong, some of them have been completely replaced with third party fixtures such as Shanghai STEP.