I was recently given an Ithaca double barrel shotgun from my grandfather. I believe it is the Flues model shotgun and the # on it is 385 654. I was wondering if anyone could tell me how to determine what grade it is and possibly when it was manufactured or how much it is worth. I do not plan on selling it as it was a gift was from my grandfather, i would just like to know a little about the gun. Any help would be much appreciated, thanks.