On May 1, 1953, ABC's New York City flagship stations – WJZ, WJZ-FM and WJZ-TV – changed their respective callsigns to WABC, WABC-FM and WABC-TV, and moved their operations to facilities at 7 West 66th Street, one block away from Central Park. The WABC call letters were previously used by the flagship station of CBS Radio (now WCBS (AM)) until 1946. The WJZ calls would later be reassigned to the then-ABC affiliate in Baltimore in 1959, in an historical nod to the fact that WJZ was originally established by the Baltimore station's owner at the time, Westinghouse.
When did ABC's New York flagship stations change their call signs? Where did the ABC New York flagship stations move their facilities to in 1953? The WJZ callsign would then be assigned to an ABC affiliate in what city in 1959?