This is a Bob Reeves trombone mouthpiece. It's a super unique mouthpiece, gold-plated and with a bent design. Jazz trombone enthusiasts will love it. It's a Clarke model, the same as a 6 1/2 AL. It excels at producing thick, yet delicate tones across all registers. The original price was over 60,000 yen, so I think it's a great deal. They're rare to find in the first place, so don't miss this chance! It's been used sparingly and is in good condition. I will clean the gold plating as much as possible before shipping. Official description: Tenor Trombone Small Shank: – Clarke 6.5AL, one or two piece, standard small shank “Mercury Blank”, 25.35mm rim, medium cup. Based on the original 6.5AL mouthpiece developed in the 1930s, The Clarke is a versatile mouthpiece for all around playing. Works great in .508-.525″ bore trombones.