Valuewise, for that gun, I would say $300 - $350, tops. Remember, it's double-action only, which makes shooting it difficult. You're not going to get accuracy out of it, especially because the currently available .38 S&W ammunition is not what it was designed for. (156 gr. vs. 200 gr. bullet.)
I might add that some of the markings may appear to have been "scrubbed" because they were covered up by the typical British black paint ("Suncorite") that was applied during overhauls.
The second asterisk in the designation meant a manufacturing simplication, namely the deletion of the hammer safety. This made the revolver liable to fire if dropped. That feature was reinstated in postwar overhauls, but if it wasn't on your particular gun, it would be unsafe to carry.