Large Murano glass retractable hanging lamp

This Murano glass chandelier was designed in the style of Carlo Nason, during the 1970s.  The glass shade is secured by an olive green painted aluminium fixture. Thanks to the retractable mechanism, the height can be adjusted, which makes it perfect for the dining room. It comes equipped with one E27 light bulb socket. Measurements: Height: 75cm not extended and 160cm fully extended. Diameter: 40 cm  Condition: small surface glass defect of about 3cm  (not a crack, not a chip), please see the photo.