Could anyone help ID this Brilhart mouthpiece?

I am helping my father-in-law sell an item from his collection but would like to confirm the info we gathered on this piece. Based on the smaller Arial font style of the serial number, lack of ligature line and other attributes, I'm guessing this is a 1954-1966-era Carlsbad, California model of the Brilhart brand and the ligature appears to be the basic 3-banded design. There is no identifier/stamp on the ligature however. Does anybody concur with this information? I would like my description to be as accurate as possible. Also, any idea as to a fair asking price on the mouthpiece and ligature?

Thank you!