Looking eastward from Rockefeller Building (Scan from June 1981)

The white building with the wedge-shaped top is 601 Lexington Ave and common to both pictures. It is a skyscraper built in 1977 for Citibank.
The 2024 Google viewmshows that two skyscrapers have been squeezed in close by. The blue building is 599 Lexington Ave, 50 storeys and complete in 1986.
The tall white building on the opposite side of Lexington Ave is 601 and The Selene a 64 storey sky scrapper completed in 2019.