Introduced in 1957 after years of research, by 1959 the Skyliner was still the world’s only retractable hardtop. This was used as an example by Ford of the years-ahead engineering the customer would find in every Ford. The Skyliner lasted three years in production, with its final year being 1959, when it sold 12,915 units despite a $400 premium over the conventional Sunliner ragtop, making it, at $3,346, the most expensive full-size Ford.