Svend Langkilde for SL...
Svend Langkilde for SL Mobler Denmark maybe.
http://www.1stdibs.com/furniture/seating/lounge-chairs/mid-century-danis...
Marked specimen
Here is another one the is marked with a photo of the marking. I know nothing about Svend Langkilde or Søren Ladefoged, but the Internet seems to suggest both names as the designer.
http://www.1stdibs.com/furniture/seating/lounge-chairs/rosewood-lounge-c...
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