In addition to what I stated above, I've seen a number of higher grade NIDs without the indicators in lower serial number ranges, which were likely special ordered without. In his original review of the NID, Capt. Chas. Askins said "it smacked of the Heinie gun" which probably didn't endear it to veterans of The Great War!! However, there were indicators on the good Captains Magnum-Ten No. 4E+. I've never seen a good enough picture of his fully loaded No. 5E 16-gauge to tell if it has indicators or not.
