No such thing, you probably mean Liberty Half Dollar. The Jefferson nickel was in place at the time of 1945. Depending on the condition of the Half dollar it would be $5-$8 depending on the average condition.
Pretty much nothing besides what the coin is worth. This is a piece of jewelry and does not have any interest to a coin collector. Currently a 1945 half dollar is worth at least 14 dollars. I'm guessing yours is worth closer to 17.