- This 4" X 6" print of a Bell Model 47 helicopter has a military green frame that measures 8.5" X 6.5". The Bell 47 was used as an observation, MASH MedEvac and utility helicopter during the Korean War. it was the first helicopter certified for civilain use in 1946. 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.