Boccaglio per sassofono contralto BEECHLER L4L - INTARSIO DIAMANTATO VINTAGE ANNI 80, PUNTA .072"
This one dates to the 1980's or thereabouts. It has a white diamond shaped bite plate inlay on the beak. It is stamped "L4L" on the side. If I'm not mistaken, that indicates a large bore/chamber and long facing curve.