This is a 60's vintage Duck Bill Berg Larsen Bari sax mouthpiece that was perfected by Paul "Doc" Tenney. This piece has loads of power, and a great core to the sound. It speaks very clearly throughout all registers of the Baritone, and altissimo is very easy. Doc Tenney has one of the best understanding of Berg mouthpieces out there, and he is one of the greatest refacers out there. This is a great example of his craftsmanship.