National Geographic : 1959 Sep
SPuncture-safety in the Firestone Premium Quality tire is achieved by Firestone's exclusive Silver Seal inner lining. It smothers puncturing ob jects with an airtight grip. The built in two-ply inner safety tire and nylon cord body end blowout hazards, prevent sudden loss of air regardless of outer casing damage. BETTER RUBBER FROM START TO FINISH Copyright 1959, The Firestone Tire & Rubber Company B13331snOiJi SXFF'T"I!