Unused card with watercolor by Mabel T. Burr.  Other lighthouses much younger than this (according to captions on the postcards) claim to be older.  We could do more research, but if lighthouses are your hobby, you know better than we do.  This one might really be one of the oldest, because as the caption says it was “built 1764 from the proceeds of a lottery, is 103 ft. tall and … has shone virtually without interruption for the last 200 years”.  Some aging, but still:  Grade: 1.