VION A130 series:
The dial with the open centre, behind a mineral front glass, shows the barometer mechanism with its fine mechanical details.
What is the high sensitivity mechanism?Accuracy is ±2hPa (millibar).
The drawing information includes an illustration showing how the “amplitude” of the movement of the pointer is amplified in the Hi-Sensitiv mechanism (160°) compared to the traditional barometer (108°).
Click "Drawing".