Looks Czech to me, Skrdlovice, in fact, and by one of the Beraneks. 1950's. The green is a little harsh for Skrdlovice but I'm assuming that's because of how you took the photo.
Nice piece.
David
PS Looking again, I'm less sure of the attribution. A clearer photograph taken against a white background would help a lot. I'm just not sure what I'm seeing.