The other four S-55s should be N406A, N407A, N417A and N418A. Location assumed to be LGA. Photo from: Vertical Flight Society

Location not given, but old NYA timetables list one heliport that might well be it. This was situated in an industrial area at Hanover Street, Stamford, Connecticut. Photo from: Vertical Flight Society

A new and deadly strain of flu emerges in China, and a pandemic spreads... in 1957. A vaccine was developed in the United States by the summer, and here the first doses are being rushed to LGA airport by helicopter from the Lederle Labs in Pearl River. Photo by: Walter Sanders / Life

New York Airways operated the Boeing Vertol 107 between the roof of the Pan Am Building, near Grand Central Station in Manhattan, and New York airports between late 1966 and early 1968. Despite noise complaints, the service briefly resumed in 1977 with the S-61L. Photo from: Pan Am Historical Foundation

Location should be the West 30th Street Heliport, which New York Airways used before 1960. Photo from: Smithsonian Institution

A New York Airways 'Skybus' hovering over Idlewild. The new airport is still unfinished. Photo from: Port of New York Authority

Later sold in Canada to Okanagan Helicopters.

NYA offered scheduled helicopter service from atop the Pan Am Building in Midtown Manhattan to airports in the area. Founded in 1949, an accident in 1977 on top of the Pan Am building precipitated the closure of this heliport; the airline stopped operating two years later. This S-61 was later N614RM and C-GJDR, now flying logging operations with Sunwest helicopters in rebuilt shortened form.