Bob, sounds like it might be proofed for black powder between 1875 and 1887. The action patent is 1875 and the style is that of one of the earlier Anson & Deeley boxlocks, forend patent is 1873 and the Westley Richards patent fastener is 1862 so the best time frame for your gun would be 1975 to 1887 based on the proof marks. Style would put it in the latter half of the 1870's. As Jent indicates, some Isaac Hollis guns also have this type of top lever. He was another 'maker to the trade' and would have no doubt supplied Westley's with actions. The Trade mark on Westley Richards guns is a triangle. I have a little Isaac Hollis that is virtually identical to the WR Gold Name model except for the name on the action. Nice gun and a classic for geese; just ensure that you use the correct ammo. Unless it has been later proved for nitro it will alsmost certainly be a 2 5/8 inch chamber black powder piece. Nice gun. Lagopus.....
