Debuting in 1955, Chrysler's vaunted 300-series “letter cars” established the company as a leader in performance and style.

For a full decade, each successive model was given an assigned alphabet letter suffix, and today the cars are considered an important ancestor of the muscle car.

After three years of the same exterior design wrapped around body-on-frame construction, the 300F of 1960 brought major change to the series as the first letter car built with unibody construction.

Passengers were treated to an interior with four individual, leather-covered, contoured bucket seats—also a first for the letter series.

The front chairs swiveled to aid ingress and egress.

A full-length center console running from the front to the rear of the cabin included armrests, storage compartments, power window controls, an ashtray, and a large tachometer.

The futuristic AstraDome instrument panel featured an array of Space Age switchgear and a 150-mph speedometer illuminated by innovative Paneles...