1960 Sliding Sun Roof Hardtops

"Many will be delighted to choose this exclusive new option for the Thunderbird Hardtop...a sliding roof panel that provides glorious open-air freedom. Effectively sealed in aluminum channels for weatherproofing. Slides and adjusts with one-hand ease. Simple handle locks top in any desired position. Helps make heating and ventilating more efficient, too."

-from the Buyer's Digest of New Car Facts for 1960