Galvanometer mechanism details from an Ohmmeter, 0 to 50/500/5000 ohms, table model without push buttons, Bakelite case. To use it there’s a need for an external power supply: 4Vdc.
Made by Gerätewerk Karl-Marx-Stadt (Chemnitz), in the German Democratic Republic (GDR), 1950s.
<a href="//commons.wikimedia.org/wiki/User:Mister_rf" title="User:Mister rf">Mister rf</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>