you made me look..
out of the 6 71 mirrors i have
4 painted
2 chrome
only one has no date code.
a drivers side painted remote
it was from a Windsor car
the pass mirror from that car was missing.the door was changed at one time.
i can check some earlier mirrors for you if need be?
i probably have 4 or 5 of them
but that will take me time and a good search to dig up.