Duncan Electric (Manufacturing) Co. (1901-1975)

DC Singlephase Polyphase Switchboard Rotating standards
A        
D D   C, F  
E, EA M   R, FR  
ER M1   MS  
  M2 M2P M2 series  
EK MD MD MD  
  MFS, MFA MF MF-W  
    MG MG-W  
    MH MH-W  
  MKS, MKA ML    

For more information on later Duncan meters (1960-1975), Landis & Gyr (1975-1998), and Siemens PTD meters, refer to the modern meters section.

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