Royal ø180-series (6’’ dial)
The Midi- and the Royal-ranges have been made according to the old craftsman principles.
Punched out 0,8mm brass discs are formed by the metal spinner at the turning lathe.
All cases are polished and lacquered twice or
chromium plated brass.
White ø137mm dial and ø180x100mm case.
Accuracy is ±5% between 25 and 100% relative humidity.
Weight approx. 1kg.
