3x 2N2369 @ ~60, 80, 80 hfE. Biased to ~7.8, ~1.7, ~7.8. It is stupid loud. Unity is around 9:30.
This is in a 1590B. I have since reworked the layout so it can be dropped into a 1590B or with pots flipped, into a 125B - along with a few other tweaks. You can see the pot pins on the bottom row...