Silicon NPN bipolars--six of 'em. No wonder the thing has gain & distortion out the wazoo.
It's not my favorite fuzz style either, but "opinions vary widely" when it comes to effects in general and fuzzes, in particular--or so it seems to me. But since this was an opportunity to add a cool (and free!) vintage fuzz pedal to my collection, I couldn't pass it up. This fuzz apparently has lots of fans, so if I don't like it, I can always sell it to someone who does!