This is a very cool find - an original Dave Guardala "Michael Brecker I" tenor sax mouthpiece. This piece is the holy grail for fans of Guardala mouthpieces, and it is in great shape.
This piece is all original. The original gold plating does show some wear but physically, the piece has no dings, no major scratches, and only a single light indentation in the bite plate. The original tip and rails look great and the piece measures .105".