This is a unique piece that has had one owner previously. It is an authentic Guardala Tenor Mouthpiece that measures .108 and looks very similar to an MB 1 or Traditional. It is unsigned, but is 100% the real deal. There have been other documented unsigned Guardala pieces verified by Jennifer Price. This one was extensively compared to 3 other original signed Guardala pieces and has near identical markings and we have had 100s of Guardalas through the shop and worked on them extensively. It is a fantastic player and these are hard to find. Please contact the shop to talk more about this mouthpiece!