Dim. ( W-D-H ) 195 mm x 235 mm x 115 mm  /  7_3/4" x 9_1/4" x 4_1/2"

PRECISION  DC  MILLI-VOLT METER   SIEMENS & HALSKE / Germany  (1930)
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                                                           SN = 4880

CLASS 0.2     45 Milli-Volt ( Ri = 10 Ω )   /   3 Volt ( Ri = 1 kΩ )

Upper Scale =  0..150 ( x0.3 black ) ;   Lower Scale =  0..3 ( red )

Housing is made of bakelite  -  Original state:  No seal was broken!

R E M A R K :                      U [Volt]  =  R [Ohm] * I [Ampere]
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Because  OHM's LAW, this instrument is also a PRECISION mA-Meter ...

       45 mV = 10 Ω * 4.5 mA ;     3 V = 1 kΩ * 3 mA
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                    Have a Look at an AEG Version ...
impressum:
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© C.HAMANN        http://public.BHT-Berlin.de/hamann        11/16/13