That is a 1938 gun. Value on the prewar guns are slightly less than the later guns. They were all engraved, but there were several different grades. You would need to have it evaluated in person. Value can range from $800 to over $10,000.
Contact Browning or compare against known examples.
Go to the Browning website to date it - http://www.browning.com/customerservice/dategun/ Check the auction sites for value. Your description is vague at best.