My take is going to be slightly different. That most certainly is a Westley Richards front sight. Westley may or may not have had anything to do with sights installation. I do not think they did and I do not think it is a Westley rifle. The British signed their barrels, either with the firms name or sometimes with "shot and sighted by....", my personal belief is that you have a Westley Richards sight installed on the Ross SDS that originated on another rifle. Also notice that the only item engraved on the whole rifle iis the front sight. Just my view, I have been wrong before.
SKB - I am familiar with what you are referring to. For example here is my Ross M1901 .303 that was done by Charles Lancaster. As the pictures show, the barrel has Lancaster's name on it:
https://i.imgur.com/7mYqiKU.jpghttps://i.imgur.com/ZQTt5gP.jpghttps://i.imgur.com/Wr1EDgZ.jpgI'm speculating my SDS was refined by a British gunmaker. I've seen Ross rifles refined by Lancaster, Gibbs, Cogswell & Harrison and others. Unfortunately, the only markings I have to work with is the serial number added at the rear of the action. If the serial number had a B prefix, that would point me in the direction of Gibbs. But it does not. This takes me back to why I started this thread and I am looking for the maker who refined this rifle. The serial number stamped at the rear of the action (photo link below) was not put there by Ross. This is a clue but I don't know where to go from here. As I stated above, the serial number is beyond the known numbers for Westley Richards. Any suggestions as to a new path I might follow?
https://i.imgur.com/LrT2fw8.jpg
