The Firestone F70x14 Wide oval was used in 69 and 70 but white sidewall only. The raised white letter version was introduced in the 71 model year.The Goodyear F70x14 Polyglas was no-size style until Nov.1969 according to Goodyear engineering prints. This is well into the 1970 model year. The earliest No size date I've seen is 3rd week November 1969.