Richard — Welcome to the GMB
Although I can't eliminate the possibility other manufacturers, your vase is the only real candidate I've yet seen for a piece matching a late 1939 trade advertisement by Haden, Mullett & Haden:
(http://glassgallery.yobunny.org.uk/albums/userpics/10318/normal_hmh_pgad_19390901.jpg) (http://glassgallery.yobunny.org.uk/displayimage.php?pos=-8614)
Click for GlassGallery link with a click to enlarge option.
If it is Haden, Mullett & Haden, it is an important piece for the history of Stourbridge glass.
Thanks for posting it.
Bernard C. 8)