The Air Zoo's Mallard was built in January 1947 at Grumman's plant in Long Island, New York.
Grumman G-73
Mallard
The Grumman G-73 Mallard is a medium, twin-engined amphibious aircraft. Manufactured from 1946 to 1951, production ended when Grumman's larger SA-16 Albatross was introduced. The Mallard was designed for regional airline operations with two pilots and ten passengers, especially aimed at harbor-based, city-to-city hops on the eastern seaboard.