Wondering if I have anything here besides a cool poster

[hav2fish]

My grandmother gave me this out of an estate she bought. I thought it was pretty cool as I occasionally enjoy a cold beer. Pulled it out the other night and looked up the artist ( David Weidman) and see that he is fairly well known. I understand that he does limited prints but this is not numbered or signed like those I've seen. Could it be some type of original? It seems to be on regular poster board and has been treated a little rough over the years but is still in pretty good shape. Thinking of having it framed and am wondering how far I should go to have it touched up/preserved. Thanks for any help you can give.