I am looking to find out when my print was made. It''s a norman rockwell "Oh yeah". It''s signed with no date and above the signature there''s a copyright that says "B&B". All the prints I have found online do not have this same copyright mark...as far as I can tell. It''s printed on textured paper, like a textured pastel paper or watercolor paper. Any help would be appreciated! Thnx!