The T stands for “touch” Wah, The effect made wildly popular by Edie Brickell‘s guitar player with the 1988 hit “What I Am”.
This particular unit is the 3rd variant from mid 80s There is serial number inside for dating
The ACA-120 power adapter is also included which is a real score because they are hard to find. This is fundamentally different than a PSA power that boss has used for a long time
