Need ID on teak wood Secretary unit Designer? Company?  

"Need"? What is it with all this demanding language for identifications? This is Aunt Mark's parlor, one should arrive more suitably.
And there is no designer. It was made by a manufacturer on an island way out in the Baltic that is called Bornholm. The mark which walked off with the back panel has an image of said island and the letters BM. A variety of clowns somehow have jumped to the preposterous conclusion that these initials stand for Børge Mogensen; they do not. It is designer-less.

Leif, that comment you left was very rude. Thanks for stating that the piece is "designer-less"
I cleaned it up and sold it to MCM Japan for 890.00
They loved it.