Here are a couple of ads for Hallicrafters receivers. The first is from the early 1960s:
(http://www.forum.near-fest.com/mm/HalliCastroAdS.jpg)
This is a photograph of President Harry Truman's desk in the Oval Office. Note the SX-28 on the bottom shelf of the table with the framed photos behind his chair.
(http://www.forum.near-fest.com/mm/Truman's_SX-28.jpg)