Hi,
Welcome to the BBS. You have a Webley and Scott built gun, retailed by W Richards. The clue to the W&S origin is the big serial number on the bottom of the barrels. If you post the complete number we can run it against known W&S records.
The proof marks are from between 1905 and 1924(? not near my books).
The importer was Hill Rod and Gun of Bozeman, MT, They are a great company. Google them and give them a call. They might be able to tell you more.
On this BBS we love it when someone asks the first question.
Joe
I have a W. Richards trade label, if you ever want to make a proper case for your gun. (Dave will get his $10) jn