The Irwin Armored Car (5397) comes in versions with or without a machine gun. It came in a plain mailer box, or in one of two boxes with woodgrain print like those of the Duck, Personnel Carrier, Helicopter, or Jet. One box is solid, the other has a window cut out to show the product inside. The vehicle has also been found simply shrink wrapped. If you have the window version of the box to share, please contact me. The solid box below comes courtesy of collector Steve Stovall. Be sure to check out his eBay auctions here!
Below, an Irwin catalog page with the window box version of the packaging