Francois--I assume that now it's fixed I can't do anything more, chemically, to enhance it. Is that incorrect? (I was thinking of scanning tricks that might pull up more info)
Peter, this one's a real puzzle. I don't even remember what country I bought it from! Some part of the former Soviet Union. It's a portrait I like--she's got kind of a sweet face. Guessing by the clothing 1950s or thereabouts, allowing for Soviet fashion etc.
Tinkering with it, I crushed the blacks on the lightstruck part and I get some more detail behind her there. Looks like maybe a small table (with perhaps a marble top?) on the right and probably a window up there in the middle where the bright patch is. Underneath the window I think I see a baseboard. Over there on the left looks like it could be a bookcase or secretary of some kind.
She's clearly sitting on a bed.
Background Fotokor par
Terry B, on ipernity