The fences are characteristic of the Webley and Scott W&R guns. Their best grade in that series was the London Pattern gun (the WLP) which retailed for about 50% more than the higher grade of the Monte Carlo Bs. (MCBs were produced in two different grades.) This isn't the London Pattern gun, but looks like perhaps the best grade W&R, which retailed for about 30% more than the higher grade MCBs. These guns came out of the P. Webley and Son line but could be branded as W & C Scott and Sons after the merger.