It is very dangerous commenting on a gun from a few poor res. photos but I would suggest that the gun was made by P Webley or if later that 1897, the Webley & Scott company that came out of the amalgamation. As 300846 says above, perfectly good gun but made to a price. The engraving style is very much like many Webley made sidelocks I have seen retailed by dozens of retailers.
The lock pin pattern points to very simple back action lock: no interceptor sear and possibly no independent sear spring, maybe using the lower limb of the main spring to do this job.