Buffet (Keilwerth) Expression alto saxophone This is a Keilwerth stencil sx90. Peter Ponzol designed this as the prototype for the sx 90s. It has practically the same key design setup. It has the adjustable palm keys so you can dial in the palm keys how you like them. Doesn't have the large key buttons that the keilwerth has which might be a plus for some. The horn itself looks almost new. Not a lot of scratches or lacquer wear. Pads are in decent shape. Plays from top to bottom although I would definitely have your tech go through it to check for leaks. Nice sweet powerul tone that the keilwerth's are known for. Get a professional sx90 in disguise for a great price. Comes with original case.