A possible manufacturer is William Anson,77, Slaney Street , Birmingham,1877-1890. Invented the Anson fore-end catch, patent No;3791 of 1872. Prolific inventor, worked with J. Deely to perfect the Anson cocking mechanism.[Anson and Deely action resulted from their cooperation].I have seen shot guns marked W. Anson,but I have never seen a gun marked Anson and Deely,except in recognition of their joint patent.
Any gun marked "London,"is always a concern to me! I have seen several examples of fraudulent names always accompanied by the word, London,, applied to a guns of dubious origin. My concerns are hightened when there is no known record of the maker named, "Anson & Deely", ever having a London address.
The pictures show a nicely engraved gun,beware the gunmakers adage,"engraving hides the gunsmithing"!