Firestone ‘Polonium’ Spark Plugs, New Old Stock

Firestone Polonium Spark Plugs, New Old Stock  In very good shape for the age, mid-1940s, including the original box.  Box of 10.  One corner has some tearing (seen in T-30-W pic above lettering).  Really cool piece of American automotive history, dated 1945 inside top.  Whether you collect Firestone, vintage automotive or like having original American products in your garage.