In 1957, National Telefilm Associates (NTA) purchased the television stations WAAT and WATV for a total of $3.5 million. This acquisition was reported in the broadcasting industry news of that time, highlighting the growing importance of television as a medium.
For further details, you can refer to the source: WNET - Wikipedia.
Here are some relevant images from that era:
These images capture the essence of television during that period.