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The "Elementprufer"

The elementprufer (ie battery tester) can be found in both leather & bakelite cases. The instrument is basically a small voltmeter for reading the battery voltage. It has 3 scales that are selected by moving the knob on the back. Position 1 is for 1.5 volt batteries, position 2 for 3 volt, & position 3 for 4.5 volt batteries. The small window on the front at the bottom centre also show the position selected. You can see the "1" in red above for testing 1.5 volt cells.

Spannungsregler (Voltmeter)

The voltmeter face.                                                           Instructions inside the lid.

The voltmeter case open & the bottom panel partially open.    The underside of the meter showing lead storage area at left & battery compartment at right..

Maker plate on the end. Light WaA impressed into the wood above it.       The meter with lid closed ready for travel!