As above, but more finely finished. Engraving coverage more profuse. Most modern D grade guns were fitted with Titanic barrels. Only about 280 were built with Parker single triggers; about 280 built with ventilated ribs. Approximately 9,346 were made: 8-gauge—10, 10-gauge—45, 12-gauge—6,330, 16-gauge—1,178, 20-gauge—1,536, 28-gauge—187, .410 bore—60. NOTE: Add 35 percent DHE (ejectors); 15 percent 16-gauge; 50 percent 20-gauge; 300 percent 28-gauge; 500 percent .410 bore.