There are four Sony transistors inside. One is a 2T76 and there's also a 2T73 in there. A third is wrapped in a metal sheath to dissipate heat, (yeah, a heat sink), so the part number can't be read. And the fourth suffers from the stripped (oxidized?) plating that afflicts many of the early Sony cylindrical transistors and renders the part number illegible. Oh well, shouldn't be long before I dig up a schematic drawing for the model and confirm the rest.
Particularly in the bottom photo, you can make out the clear plastic with reverse paint running the full length of the front, even under the speaker grille.