1960s Mopar outside Mirror OEM twin post Dodge Plymouth Dart Valiant ? NOS ?

Description

This mirror appears to have never been installed, but has a small area of three pits, see last photo, no other pitting other than these 3 spots.  The three pits are on the back side mirror glass head or housing. The rest of the mirror looks perfect and the chrome is bright and shiny. Appears to be a new old stock, NOS, mirror, that was not stored properly and exposed to dampness causing the 3 pits. I assume this is an OEM part and not a reproduction part, as it is stamped with the Mopar logo and part number 2299521, and the Chrysler Pentastar logo emblem on the head, as shown in the first photo. The mirror glass is marked in fine letters with 9-xv-7.
I am not sure which models this is for but possibly a Dodge Dart or Plymouth Valiant, 1962 1963 1964 1965.