[Shep]

In looking at and owning a few D grades I am wondering if anyone can shed some light on the engraving on the floor plates. I have seen pheasant, ducks and what look like partridge. Is there any rhyme or reason to it? Maybe certain manufacture dates, the engravers choice or customer request? Not sure the date theory will apply as I have seen two guns both from the same year with different engraving. Any responses would be greatly appreciated. Thanks!