Analyze the inscriptions. LVD is the old-time way of writing LUD, which is short for LUDWIG, which today is LOUIS. XV are Roman numerals for fifteen. DG means Dei Gratia, or by the Grace of God. The coin is from Louis XV of France, who reigned in the mid 1700s.
However, your coin looks like a reproduction. While there are similar coins with similar portraits of the king, I cannot find any with a reverse pattern similar to yours. For these reasons, I think your coin is not very valuable, probably a few US dollars.