When was browning Belgium auto 5 3 in magnum serial 8v 4152 made plain 32in full barrel and What is it worth?

Your Browning auto-5 magnum shotgun was made in either the year 1958,or 1968.It was the only suffix to a serial number that was duplicated by Browning before the suffix was changed to the year and then the Capitol M to follow.Example is 69M,70M,etc.