Vintage Brilhart Level Air Baritone Mouthpiece 5* .094 tip opening SU

Brilhart started making the Level Air in the 70s, after Selmer bought them out in 1966, where there was a clause stating he couldn't produce any woodwind mouthpieces for 10 years... this is what he came up with after this "break."

Based on the serial number, id say this was made in 1976, in March.