• This 4" X 6" print of a Sikorsky R-4 helicopter has a military green frame that measures 8.5" X 6.5".  The print is of one of the world's first large-scale, mass-produced helicopters.  The R-4 was used in WWII as a rescue aircraft. The frame comes with a drywall screw for mounting on a wall and a dowel for displaying on a shelf or desk.  It is a unique item for all aviation enthusiasts to display.