I recently got an A blade Raven and i had some questions i would like to ask about it. I have never had an actual Emerson before, but i always imagiend the thumb disc to be an actual disc. The one on my Raven has the dges sort of cut off ,so its not a circle, more of a rectangle with two sides rounded. Is this how they are? Also, there is no mention of the steel used on the blade. Is this also normal, because 154cm is standard and thus, no need to mention it? The years under the Emerson logo says 97. With this in mind, is there anything i should look for that would mark the knife out as genuine or not genuine? Thanks for any and all help.