Boss TW-1 T Wah with ACA-120 power adapter

 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