The T stands for "Touch" and the early TW-1's actually had the text Touch Wah written on them instead of T Wah. The TW-1 was replaced by the AW-2 in 1991. Together with the CS-1, the TW-1 is the only pedal to have a toggle switch. With only 2 controls, the TW-1 is very easy to control. The later autowah pedals have the added versatility of modulation but for the basic wah sound the TW-1 does the job without forcing the user to read the manual.
This pedal is available in store at Guitar Village Frankston 50 minutes south of Melbourne. You can drop into our shop and try it out or you can purchase it online and we will ship it out to you.