A real unicorn in vintage audio: a pair of original Polydax tweeters for Spica TC-50s. One is working, one is blown. I replaced both of them with tweeters from Madisound on my TC-50s since I couldn't find an original replacement. Now you don't have to make the same compromise I did! I'm including the blown one in case you can harvest any parts from it (or you want a hilarious fridge magnet).