International Electrotechnical Commission <br/><br/>
IEC: 51-9-1988 (Amendment No.2 - 1995); Direct Acting Indicating Analogue Electrical-Measuring Instruments and Their Accessories Part 9 Recommended test Methods 

 - Geneva  IEC  1995 
 - 3p 
<br/><br/><label>Universal Decimal Class. No.: </label> /