Vintage wood case curved sofa couch - looking to ID  

This New York dealer sold one as a "Danish Art Deco Sofa" c. 1930 but didn't give any info on a maker or how they determined it was Danish.  You could try contacting them and asking, maybe under the guise of consigning it with them.  They had it listed on 1stDibs for $11K but who knows what it actually went for.  

http://www.sophiaroseantik.com/furniture/danish-art-deco-sofa-1

The arm style is similar to this 1930's sofa from Danish designer Frits Henningsen.  That might have been enough for the dealer to conclude it must be Danish.  I did not see any Henningsen sofas, or other Danish sofas,  that looked like yours.   

Hi Mark737, that's great information, thank you very much!