Help identify painter signature

Ah, it's clear to see that this is a combined effort of three painters, not one.

The Photobucket Triplets, very famous. Host, Store, and the ever-beautiful Share...

Sorry, just couldn't resist.

I can see something that might look like letters, but they are obscured by the "Photobucket" watermark. From this picture, I can't really tell if it's a signature or just random marks.

Legally? A lot of art in 1940s Germany was stolen.

How about a full photo, one of the back and of any tags, with a clear shot of the signature?

I can make out the initials O.H. The last name looks like H_ _D