My father, who passed away last year was a Commander Fleet Air Arm and had a dress sword engraved: Captain Robert Manners Sutton, HMS Ardent 1795. I am very happy to have this hanging on the wall but feel obliged, on behalf of the family to ascertain what its monetary value might be. Scabbard, belt and clasps. Dad would have thought this enquiry prudent. Any help would be most appreciated.