[camarojoe]

"See America's First" was used on USA-1 plates long before 1970. (Although it was used into 1970 as well.) I believe it could have been used as early as 1966 or 67 on USA-1 Plates, and several variations of the plates were made over the 4 or 5 years they used this slogan. It's also important to note that just because these slogans changed from year to year doesn't mean dealerships quit using them to sell cars. The local Chevy dealer downtown still proudly lights up their "Heartbeat of America" neon sign every morning, and even uses it in some of their print ads. Imn fact, many of the original GM issued USA-1 Plates were actually MADE long after the "official" year of the slogan, and its also likely some plates came out a bit earlier than the launch of the slogans as well.