The good ol' PC-62. As others have allready said, the only advantage it had back in the day was that it could deal with pretty loud volumes but the recorded sound was thin and harsch. I actually used the WM-D3 and the PC-62 myself during my early stealthing days.
Some tapers replaced this mic with others like the Aiwa CM-30 which, looking back at it, was a wise choice. The PC-62 recordings are really bad compared with todays standards. Being a classic mic, keep it to preserve history, but you'll be disappointed if you use it.