This is probably an impossible question but here goes...
Last year I was playing in the house band at a harmonica festival and someone came up and asked my opinion on a couple of harp mics. They were fantastic - dramatically better than the best I have ever used (Green Bullet included). Very responsive, with a fat, meaty tone, that could be altered radically just by changing hand position.
I told the guy how good I thought they were, and asked him how I could get hold of one. For some strange reason, he would not tell me anything at all. So I am now on a quest!
Both mics were very similar: unusually heavy cast metal bodies, enamelled grey, the grille similar to a Bullet but slightly smaller, and the body curved through 90degrees to quite a long "tail". Volume control under the head of the mic
Anyone got any theories? I've used the same setup for a good few years now - a little amp built for me by a harp specialist, using mostly "new old stock" 50s components, and a 50s tape recorder microphone cased in motor tyre inner tube and tape. But since I heard these mics, and what they did for my playing, I've become dissatisfied ...