Posted By:
HankronTo address your other question, I don't know what it would be worth. If it's from the 1950s, probably under $100. A lot will depend on it's size, attractiveness (display value) and if you can identify what it was used to print. If it's an original 19th woodcut used to print a Spalding Guide or Harper's Woodcut, then you would have something special.
In general, printing plates are considered an oddity and, unless you have something really special and attractive, will not gather big time bidding.