This is an exceptional Yamaha 738 made in late 70s or early 80s. It was designed in collaboration with Schilke and is a clone of the X3.  .463” large bore. 5” yellow brass bell. Very dark and open blow, but sizzles with a commercial mouthpiece. Excellent legit or lead/commercial horn. Comes with a basically new Wolfpack case with the tag still on. 100% silver plate. No dents. Evidence of previous 2nd slide dent repair. All valves and slides move freely.