Telefunken SM 2

The world's first stereo microphone, made in 1957.
[wiki]

Mentioned in Kerry's first "Tech Tuesday" blog post on 2009/09/15 as part of a run-down of mics used to capture Mike's drum sound:

For the tight overhead microphone sitting very close to the kit we are using a stereo Telefunken SM2 (It is just great for the overall drum sound, my guess is that this microphone sounds a lot like what Mike hears from his perspective.)