Who recognizes the S-shaped logo on the lamp in the photo?
We've had it for a while but I never found out which brand's logo that was (if any). I know the VDE stands for the electrical certification institute in Germany, but that's not very helpful. No other clues on the lamp other than this sticker.
Thanks in advance! 
Maybe it stands for Staff...
Maybe it stands for Staff Leuchten, Lighting Manufacturer - W Germany. But might not be the same lamp.
http://adoremodern.com/archive/stehlampe-von-staff.htm
Staff indeed!
You were right, it seems to be a lamp from Staff Leuchten from the '50s or '60s. I did some research with those keywords and I found a few more links:
- http://www.19west.de/de/produkte/staff-tischleuchte-1960s?page=5
- http://www.hollandinvorm.com/index.php?option=com_content&view=article&i...
- http://adoremodern.com/archive/tischleuchte-von-staff.html
- http://www.ebay.com/itm/Pair-Mid-Century-Modern-Germany-Staff-Leuchten-T...
I think the brand might be owned by the Zumtobel Group now, but I'm not sure. I emailed them, so I'll get back with a follow-up as soon as I hear from them. If only for future reference.
Great forum! Thanks a lot!
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