5 part leather couch, design?  

De Sede DS15
http://www.designaddict.com/buy-and-sell/Furniture/sofas/Rare-DS15-De-Se...

just a wild guess in the dark but maybe along the lines of the swedish company de sede? 

Thank you for the reactions. I contacted De Sede yesterday too, and they will tell me if the couch is part of their collection. However, the sides of my sofa are different (see the picture with three elements). 

Thank you for the reactions. I contacted De Sede yesterday too, and they will tell me if the couch is part of their collection. However, the sides of my sofa are different (see the picture with three elements). 

Thank you for the reactions. I contacted De Sede yesterday too, and they will tell me if the couch is part of their collection. However, the sides of my sofa are different (see the picture with three elements).