Firestone Tire & Rubber Co. S7427-1, Early Get a print! $8.00 Add to Cart Product Information: Model:S7427-1, Early Manufacturer:Firestone Tire & Rubber Co. (Air Chief) Description:R-314 Schematic Pages Page 1 Page 2 Please note: we carry a wide range of products which will fulfill the specifications above. Please use our search function or browse our products to find what you need!