Device for current, voltage and resistance
With Bakelite case and cardboard
scale (0-50 and 0-75) with a mirror scale under a glass window.
The pointer has jewel bearing. Made by German firm P. Gossen & Co., Erlangen, Bayern.
The meter was marketed in The Netherlands by Ch.
Velthuisen in The Hague.
The brass clip on the measurement button is probably an addition
of this importer.
The measurement button is always in measuring mode. Without this
clip, it is also possible to do a secure measurement with the
These meters were made from 1928 until the 30s of the last
With the meter came a
number of measuring resistances, so that the meter can be
adapted to the value that has to be measured. These resistances
can be fixed under the bottom terminals of the meter. Reading
takes place by multiplying the value on the meter by a constant
that corresponds to the measuring resistance.
Various fittings were made for this meter. For example the
Maweco-Zusatz for measuring alternating current.
There is also a module with several built-in measuring
resistances, which can be chosen by a button.