The Neumann CMV-563 is a "modular" microphone based around either the EC-92 (6AB4) tube or the EF-86 tube. It can use one of 4 capsules; the M-7 (cardioid), M-8 (figure 8), M-9 (omni) & 55k (omni). This mic was manufactured in Gefell, East Germany from approx. 1956 to 1972.
          
    Neumann CMV-563 with M-7 (cardioid) capsule.        Neumann CMV-563 with M-7s (cardioid) capsule.