Vintage wall lamp "Telescopic" in wood and opal glass, Sweden 1960s

An opalinefrosted and hand blown glass shade with a decorative teak wood cone covering the entrance off the cable at the top of the socket. The pendant is attached to a telescopic wooden arm that attaches to the wall. These were made by many Scandinavian manufacturers during the 1950s and 60s and I have not been able to identify were this one comes from. I can tell from experience that it is very well built and that the hand made glass is of great quality. The glass shade is 32 cm tall including the wooden cone, and 22 cm wide. The telescopic wooden arm stretches between 60 cm to 90 cm. Very good condition with only minimal signs of use on the wood. No damage or nags to the glass shade. Standard E27 light bulb socket.