Originally Posted by sc2dave
I'm getting a Corvette but not sure year. I think it's a 74,but lens says 70. I'll find out later today what year it is.
You don't need a lens date to tell those two years of Corvette apart, it is readily apparent from 50 feet away....the 1970 has chrome bumpers front and rear, the 1974 was the first year to have urethane front and rear bumper covers like all new cars have today.
That's if someone hasn't done some shady parts swapping trying to make the rubber bumper '74 look like the more desirable and more valuable 1970 model..
As a general rule, tail light lenses, side marker lenses and front turn signal light lenses will bear the year number for the year that body style was introduced, unless there has been some revision.
My 1972 Nova as an example.....body style was introduced in 1968, but all the pertinent lenses were revised in shape and size in 1970....my Nova has all the original 1972 pieces
-The red rear and yellow front side marker lights have 1970 on them as they were unchanged from 1970 models,
-The front turn signal lenses have 1971 on them, the 1970 had a clear lens with yellow frosted bulbs, in 1971 it was changed to yellow/orange lenses with clear bulbs, so my 1972 still says 1971 on it's yellow/orange front turn lenses.
-The tail lights were the same for 1970 and 1971, but the size of the clear reverse light portion changed in 1972(was made larger), so those lenses actually do have 1972 on them.
If you tried to use a lens date to name the year of my 1972 Nova, you would be totally confused by the time you looked at them all
Through all this, I could swap any or all of those lenses 1970, 1971, and 1972 and they fit right up, most people who aren't Nova owners would never even notice if I did.