Comparing this to my Gale Hollywood, it looks the same. Unlike the Gregory Model A, the Hollywood has an aluminum ring rather than brass. I've seen a Model A tenor
with no ring, but never one (regardless of which horn) with an aluminum one. Unlike a Hollywood Master, the ring does not extend to the bottom of the mouthpiece. Also, all the Masters that I've seen have brass rings. Finally, a Model A bari mouthpiece would be really rare. There was a Model B a while back on ebay, but I've never seen any mention of a Model A bari. Overall, Gale/Gregory bari mouthpieces are not very common and the Gale Hollywood is famous, of course, as the Mulligan mouthpiece. They play really well. I like mine, because it tunes more easily than any other I've encountered on my King Margaux Low Bflat bari.