I just pulled Jerry MacNeish's 1969 fact book; I recalled from his book info on this topic.
According the Jerry, "Early production rally sports have directional lenses trimmed with bright metal rings. The outside of the lens is painted Argent Silver. These were discontinued prior to January, 1969".
There is always the possibility of deviations to this. If you have an early build survivor or unrestored car with the Argent silver painted on the back side of the lenses, and/or still have your original bright trim, please post pictures and let us know the build date and VIN of your car.
My 05A Norwood RS had clear lenses and no bright trim.