Some info on your D Moore
The revolver was manufactured by Moore Patent Firearms Company of Brooklyn, MY The firm made several thousand such revolvers between 1861 and 1863. Examples with 4", 5" or 6" barrels may be encountered. The Moore revolver was fairly popular for a brief period, but production was stopped because of a patent-infringement suit brought by Smith &Wesson.
Should be a 7 hole cyl and approx .36 cal
Many of these revolvers were privately purchased by Union officers and enlisted men during the Civil War, but the arm was not adopted by the U.S. military.
The Unique model is the Military & Police
Field stripping it
Value? You need a apprisal