I think it might be a Webley-Pryse copy made in the Darra region of Pakistan/Afghanistan.
It could have been made in China, but British influence in China was negligible, whereas British weapons were common in the areas mentioned. I once bought a Pryse lock revolver in a bunch of guns that came from that area, including several Webley copies, and a .303 pistol (!) built on a Martini action. The Webley-Pryse, oddly enough, turned out to be genuine.
Jim