Hi. Cleaning out a storage room, I came across a 1950s version Day the Earth Stood Still movie poster I bought at an estate sale about 20 years ago. I looked at a movie poster website and found it but authentication is fuzzy and hope maybe I could learn more here. It is unused (no pin or staple holes, folding, etc.) but has no copyright or other printing on the border. It's 20"x26". Any chance it's the real deal or has any monetary value? Thanks.