Fayl:Voltmeter hg.jpgDescriptionVoltmeter hg.jpg English: Small demonstration voltmeter used in science education, on display in the Schulhistorische Sammlung (School Historical
Fayl:Voltmeter-1940 hg.jpgDescriptionVoltmeter-1940 hg.jpg English: Voltmeter (about 1940?) Date 23 May 2010 Source Own work Author Hannes Grobe
Fayl:Voltage-meter hg.jpgDescriptionVoltage-meter hg.jpg Voltmeter - ohmmeter Date 7 January 2014, 16:47:18 Source Own work Author Hannes Grobe
Fayl:Voltage-meter-back hg.jpgDescriptionVoltage-meter-back hg.jpg Voltmeter - ohmmeter, battery shelf Date 7 January 2014, 16:47:49 Source Own work Author Hannes Grobe
Fayl:Voltage-meter-out hg.jpgDescriptionVoltage-meter-out hg.jpg Voltmeter - ohmmeter, lid closed Date 7 January 2014, 16:48:38 Source Own work Author Hannes Grobe