The official USPS press release for the Early TV Memories set can be found here. It includes large images of all 20 stamps.
The 20-stamp Early TV Memories set released by the United States Postal Service on Tuesday can now be purchased at USPS.com for $8.80 ($0.44 x 20). They’re self-adhesive, which is always a plus. An uncut sheet of nine “panes” will set you back $79.20. Also available is a booklet of 20 pre-stamped postcards featuring large images of the stamps on the front.