Hand made child's clacker pistol

Just under 11 inches long and all hand made with the initials J.W.N. stamped on the butt of the gun.  Made from a solid piece of wood with some nice off balance elements to it.  Hard to know the date but I'd guess 1940's - 1960's.  It has a revolving trigger that clicks the underside strip every time the trigger is pulled to produce the gunfire sound.