Ivory opera glasses in original case with rare three stage zoom, Antique and French. Early 20th century opera glasses in their original satin lined leather case. Very rare indeed as these have a three stage zoom to really allow for close up viewing, ( photos show the three stages). In quite perfect condition. Signed on the top for Madame Serine Richard a Lyon. 130 mm high max or 81 mm minimum, max width 120 mm lensdiameter 55 mm.