1960 - The Exploding Market

Following the post-war boom, the new car market was poised to explode with growth in the late 1950s and early 1960s. Rambler saw this growth coming, and attempted to capitalize on it by teaching their sales network about it.
These presentations were delivered on a filmstrip, which the display person would advance manually every time the accompanying 16 inch transcription disc beeped. There were a small number that had embedded FSK signals to advance a system automatically, but those were short-lived, because they weren't as reliable as the manual way.