Is this old movie poster worth anything?... help please?

Question

I have three old movie posters. I don't know if they are worth anything though. The first one is called "Dakota Incident", second one is The deer slayer and last one is "Return to warbow".

The posters have these numbers at the number... I'm not sure if it means anything... one of the numbers is "56-312".

Also its says at the bottom, "Property of National Screen service corp. Liscened for display only in connection with the exhibitian of this picture at your theatre. Must be returned immediately thereafter."

Thanks in advancee!!

Answer 1

I would save those if I were You, someplace safe.