I've always liked this thread, so I'm guilty of digging it back up again.
Have really been enjoying my Swan 260, and have been looking for a while for the correct OEM microphone, which was a Turner SR-90. Finally grabbed one for five bucks plus some shipping. At first glance I was pretty sure I'd over paid - it was rough! Kinda' cool looking though, with the cast zinc body and front mounted hanger button.
This gave me a chance to use my new (to me) B&K oscilloscope. it quickly showed that the mic element was functioning, so I started trying to put the old Turner back in shape.
I had to solder on the correct plug as well as re-soldering the microphone element connections. Easier said than done! The conductors were comprised of a microscopic ribbon of copper foil wrapped around thread. I presume this was for flexibility, but good heavens, it was difficult to solder without burning it up. A variable temperature iron, a light touch and a healthy amount of rosin finally did the trick. Also worked a piece of shrink tubing over the old rotted rubber strain relief. Polished up the zinc with Scotchbrite, and we're ready for work. The old Swan is smiling' now!
Cheers... Jim