Hello, I just looked at what I believe is and Ithaca NID but I'm not sure because of the serial number 433xxx and that it does not have cocking indicators. It is a very solid gun. It is also marked "field grade". It's got to be a NID but it not only has no cocking indicators but it also has a shallow drop at comb, 2.5 approx not the 3" my gun has. What do you think? Thank you.