SMOKY SIGNAL AUDIO Tubeless δ Tuning Manufactured 7/11/2008, serial number is a single digit! ! ! ! δ Tuning was said to be a Matchless-style EL84. Compared to α Tuning, it has more distortion and a better response to the volume control, making it easy to use and I think it has the best tone. Purchased at a musical instrument store in Shibuya, Registered with the official importer SKINDEEP, but it seems they probably don't exist anymore. Due to the fact that this is a very rare and expensive product, and to prevent parts swapping, returns are not accepted for any reason. Please understand this before purchasing. Fully functional, There are scratches and marks. Accessories are the box and instruction manual.