Hey guys. I recently helped my band's guitarist purchase a Boss V-Wah. We got it brand new, and it comes with a 5 year warranty, but it must be registered to claim it. I just registered my TU-2 with no problems, but I cant seem to find a Serial number for the V-Wah. There are a couple different numbers on the bottom of it, but I dont know what is what. Anybody have any experience or expertise here?