This is an old Harrison alto saxophone ligature. The ligature is stamped with "A" and "D2" on the side. The diameter is narrow, so it's probably for a metal mouthpiece. Also, there is a Harrison stamp, and on the opposite side, a PAT. stamp. It's probably an original from about 30-40 years ago. The condition is as shown in the photos, and it is well-preserved. I am selling it because I no longer use it. - Model: A D2 - Brand: Harrison Thank you for looking.