Bill: I likely stole this from Researcher or Bro. Snyder
There were at least four different versions of the NID Field Grade over the years of production. The early Field Grades just had the dog and the address roll stamped on the sides of the frame. Then somewhere between 1927-29 to 1934 the Field Grades had the stars engraved on the sides, hingepin ends, bottoms, etc. Then around 1935 or 6 Ithaca dropped the cocking indicators from all grades, got rid of the dog and address from the sides of the Field Grade frame and put a wiggly line border around the receiver of the Field Grade with some nice matting on the top of the receiver. Also at that time they went to the Baker style snap-on/off forearm for extractor guns. After WW-II some Field Grades were assembled and sold with no engraving or stampings at all on the frames. This is all covered very well in The Double Gun Journal, Volume Five, Issue 3, by William R. Allen.
