Neumann SM-2 Miniature Stereo Condenser Microphone
The SM-2 has two condenser capsules mounted one above the other with the lower capsule set in a fixed position facing the Neumann name plate and the upper capsule can be turned through an arc of 270 degrees by the means of a coin slot at the top of the microphone.
The Neumann SM-2 combines the features of two Neumann M49b microphones in one small unit.
Check out our article on the history of the Neumann U87 condenser microphone. Sound Bites – Neumann U87