Did some oem mirror glass miss the date code?

Does anyone have any original mirrors or nos mirrors that missed having the date code on the mirror glass? Just curious as I have a pair of nos mirrors and the driver side is missing the code. I would say it's highly possible but wanted to confirm. Thanks in advance.

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.

No need to search more. That's good info Frank as long as you feel it's original glass and not a replacement.... Thanks maybe others will chime in...

Are you looking for a specific year?

No Morty. I was just wondering if there was a possibility that an Nos mirror I have had the glass replaced. It doesn't look like it but doesn't have the code... So I was thinking that sometimes they got skipped...

i don't believe the glass was ever changed out
it looks weathered and aged like
most of the other date coded mirrors do that i have.
it has the cars orig color under a repaint
so i'm sure it came on the car originally.

I can only speak to 70/71 model year E-body mirrors, but I assume others were the same.

Early in the 70 model year, both the driver and passenger mirrors had a date code. Then at some point in the Aug/Sept timeframe, the date was removed from the drivers mirror. The passenger mirrors still retained the date.

On original mirrors I've seen, most 70 mirrors have MONTH-DMI-YEAR format. In late 70 and throughout 71, the format changed to MONTH-JC-YEAR. Not sure what the DMI vs JC designated. Probably the manufacturer of the glass.

I have 2 sets of NOS 70 mirrors and they all follow the convention above.

Rob Thanks! That is exactly the specific information I was looking for as these are Nos 1970 E-body mirrors still in the boxes. Drivers side is the one with-out date code and passenger side looks dated like all I ever seen. Thanks again.

No problem QuickBpBp.

I had an NOS set of chrome ‘70 E-body racing mirrors and the same deal was found. Passenger side was date coded 9 69 and no code on the driver’s side.