the Otto Link mouthpiece Reviews here, posts #5 & 6:
The Woodwind Forum
Sig – “Eburnated Bar”is stamped above the top ligature line. “Reg
US Pat Off” is stamped just below the top ligature line. “Otto
Link” slanted on the body. “Serial No 91xx” is stamped below the lower ligature
Reso-Chamber – “Eburnated” is stamped above the top ligature line.
“Reg US Patent Off” is located below the top ligature line. “Reso Chamber”
is the main emblem with Reso on top and Chamber on bottom surrounding a circle.
“Otto Link” marked in the slanted chain circles. “5*” marked on the
bottom of the table.
This mouthpiece has a very wide A frame throat. No very centered
playing and used for jazz.