Agree, this is extremely rare, original 6 tip opening Otto Link Tone Master alto sax mouthpiece, it's a little beauty in excellent condition. Not without a wear of course, but the condition really is great as you can see. These are very dark sounding pieces due to larger chamber and low baffle. Would suit certain styles of music, but equally would be a great addition to any collection.
I doubt there're many original 6 tip openings around. The item "VINTAGE OTTO LINK 6 PRE FLORIDA TONE MASTER ALTO SAX SAXOPHONE MOUTHPIECE" is in sale since Sunday, February 2, 2020. This item is in the category "Musical Instruments\Wind & Woodwind\Parts & Accessories\Mouthpieces".
The seller is "little_oni" and is located in London. This item can be shipped worldwide.