S American Flyer 6-48436 NYMX 1991 NASG Commemorative Mechanical Reefer #491 in 1:64 scale is a Hi-Rail reefer freight car equipped with knuckle style couplers. Manufactured in 1991, this plastic model features factory painted detailing and comes in its original box. The reefer has metal trucks with plastic wheels and is a part of the American Flyer brand, commemorating the NASG in the 1990s.