Earliest AM/FM I know of was a '67 Poncho Lemon with the OHC-6. It also had a factory Re-verb. I suspect they were around a couple years before that but it was the first one I owned.

Every electronic device is manufactured with smoke stored deep inside... only a true genius can find a way to set it free. The most terrifying words in the English language are: "I'm from the government and I am here to help!"